Below there is a changelog, which was made at 5.4.8 for the last 4 months, from 19.07.17 till 17.11.17:

Status: applied.

General:

• Added NPC which allows to change the appearance of weapon enchants for rating, honor points and conquest points.
• Fixed an issue when new pets could not have full HP after summoning.
• Added button "Show all items" at the vendors which sell items for transmogrification (FUN realm).
• Added NPC which allows to change the appearance of player (FUN realm).
• Now you can use the Arena Spectator when you have a pet.
• Fixed an exploit that allows to avoid NPCs attacks.
• Fixed problems with the positioning of the player in some places, for example "Vale of Eternal Blossoms".
• Fixed a calculation of the item level of the character, if he uses a two-handed weapon.
• Fixed a bug that made it impossible to put an item in the bag when using the equipment manager.
• Fixed the displaying of enchantments, durability and random properties on items in the trade window.
• The damage from the boss's abilities will no longer delay the spell casting of players (push-back).
• The model of Gib the Banana-Hoarder has been fixed.
• Cooldown resetting in duel-zones will now possible only in accordance with faction.
• Player searching in the Arena\BG Spectator now possible in in any register.
• Added PVE Spectator.
• Fixed movement speed for pets.
• Fixed animation of swimming for pets.
• Fixed displaying of regeneration of resources for pets (for example hunter pets).
• Fixed reading of mails from the bag.
• The maximum number of pets you can have in the collection is increased to 1000.
• Training Dummies are now immune to Ursol's Vortex.

Achievements:

• Fixed A Void Dance.
• Fixed I'm on a Diet.
• Fixed Chaos Theory.
• Fixed Respect Your Elders.
• Fixed Less-rabi.
• Fixed Dehydration.
• Fixed The Incredible Hulk.
• Fixed Ruby Void.
• Fixed Emerald Void.
• Fixed Amber Void.
• Fixed Consumption Junction.
• Fixed Share The Love.
• Fixed Brann Spankin' New.
• Fixed King's Bane.
• Fixed Shattered (10 player).
• Fixed Shattered (25 player).
• Fixed Once Bitten, Twice Shy (10 player).
• Fixed Doesn't Go to Eleven.
• Fixed Once Bitten, Twice Shy (25 player).
• Fixed Dwarfageddon (10 player).
• Fixed Dwarfageddon (25 player).

Arenas and Battlegrounds:

General:

• Fixed the returning in a battleground after disconnect.
• Fixed displaying of pet's action bar while using /reload.
• Fixed displaying of group markers while registering as a group.
• Implemented 3v3 Solo-Queue arena. Use .wargame queue solo OR NPC in the capital city to join the arena. You need to have at least a 530 item level to join the arena.
  When registering, the system tries to form a team of three roles: 1 healer, 1 melee player, 1 ranged player.
• Upon the second receiving the aura Deserter within 20 minutes the aura will have 15 minutes duration (earlier 10).

Deepwind Gorge:

• Fixed possibility to capture the Flag under the buffs Divine Shield or Hand of Protection.
• Fixed capturing the carts.
• Fixed movement of the carts.
• Fixed displaying of the timer and the number of players in the arenas.
• Fixed a bug due to which the spectators could got into the arena frames.
• Fixed a bug due to which the spectators could got under the ground, trying to follow the player.
• Fixed displaying of the timer to the start of the arena when using crystals.

Strand of the Ancients:

• Removed spell Ram of the Battleground Demolisher.
• Fixed HP of the Battleground Demolisher.

Isle of Conquest:

• Fixed capturing the fortress.
• Fixed displaying of the destroyed gates.

Alterac Valley:

• Fixed the location of the gate on the starting position of the alliance.
• Added Drakan and Duros.

Temple of Kotmogu:

• Fixed displaying of the players captured the sphere.

Twin Peaks:

• Fixed the location of the gate on the starting position of the alliance.

Instances and raids:

Siege of Orgrimmar:

General:

• Fixed a bug due to which the characters visually hovered in one position.
• Fixed a bug due to which the Bonus Roll cost more than it is supposed to.
• Correcting the health points of creatures at the different modes.
• Fixed some doors.
• Fixed movement speed of the next creatures:
  - Siegecrafter Blackfuse
  - Kaz'tik the Manipulator
  - Iyyokuk the Lucid
  - Korven the Prime
  - Rik'kal the Dissector
  - Hisek the Swarmkeeper
  - Kil'ruk the Wind-Reaver
  - Skeer the Bloodseeker
  - Xaril the Poisoned Mind
  - Ka'roz the Locust
  - Garrosh Hellscream
  - Malkorok
  - Rook Stonetoe
  - He Softfoot
  - Earthbreaker Haromm
  - Wavebinder Kardris
  - General Nazgrim
  - Galakras
  - Iron Juggernaut
  - Thok the Bloodthirsty
  

Immerseus

• Corrosive Blast will now apply debuff on a Death Knights while Anti-Magic Shell is active.
• Fixed damage Sha Splash.

Sha of Pride

• Now at the beginning of 2nd phase Norushen will die.
• Now Projection will spawn in a short distance from the player.
• Fixed the periodicity of damage of Unstable Corruption in 25 ppl mode.
• Fixed spawn points of Rift of Corruption.
• Fixed the location of the traps and the radius of their activation.

Rook Stonetoe

• Fixed damage of Inferno Strike.
• Fixed number of targets for Shadow Word: Bane on different modes.
• Fixed duration of Gouge.

Earthbreaker Haromm

• Fixed an exploit with the ability to attack only one boss.
• Fixed the bug due to which the damage of the ability Iron Prison was not affected by defensive abilities.
• Fixed the bug due to which the damage of the ability Iron Prison was not affected by defensive abilities.
• Fixed the bug due to which the ability Deterrence could deflect the Iron Prison.
• Fixed scale of Iron Tomb.

Secured Stockpile of Pandaren Spoils

• Fixed abilities of Nameless Windwalker Spirit.
• Fixed abilities of Wise Mistweaver Spirit.
• Fixed abilities of Ancient Brewmaster Spirit.
• Fixed abilities of Sri'thik Bombardier.
• Fixed abilities of Burial Urn.
• Fixed abilities of Quilen Guardian.
• Fixed abilities of Animated Stone Mogu.

Thok the Bloodthirsty

• Fixed an exploit when boss could not kill players on the 2nd phase.

Malkorok

• Fixed a bug due to which the boss did not stop summoning the Essence of Y'Shaarj on the 2nd phase.

Iron Juggernaut

• Fixed damage of Explosive Tar in heroic mode.
• Fixed a damage type of Borer Drill.
• Fixed the bug due to which Iron Tomb was active.
• Fixed damage of Borer Drill.
• Fixed a bug due to which Crawler Mine could not be taken to the target.

Siegecrafter Blackfuse

• Fixed a problem with the calculation of the next overloaded weapon in heroic mode.
• Matter Purification Beam will now deal the damage to players only.
• Fixed an issue when the player on the pipeline received damage from the abilities of the boss.
• Fixed a problem when it was impossible to attack Crawler Mines in heroic complexity.
• Fixed the problem when new Crawler Mines did not appear after the explosion of Superheated Crawler Mine in the heroic mode.
• Fixed duration of the displaying of lasers.
• Fixed damage, position and radius of Launch Sawblade.
• Fixed damage of Magnetic Crush.
• Fixed the bug due to which Launch Sawblade was used only once at the whole fight.
  использовался всего 1 раз за весь бой.

Norushen

• Fixed resetting of the Corruption while using Alter Time.
• Fixed a bug due to which players could avoid boss attacks during the duration of the spell Blind Hatred.
• Corrected the dependence of the damage on the amount of Corruption.
• Fixed receiving a bonus (depending on the specialization of the player) while having the aura Purified.

General Nazgrim

• Fixed animation of the boss and minions.
• Fixed a bug due to which Kor'kron Ironblade did not use Ironstorm.

Garrosh Hellscream

• Fixed a bug due to which Empowering Corruption could hit the players.
• Fixed a bug due to which the summoned creatures had two different auras Empowering Corruption in the heroic difficulty mode.
• Fixed a bug due to which the boss could disappear.
• Fixed a bug due to which the boss did not move between phases.
• Fixed a bug due to which some NPCs were already dead but continued to attack players.
• Fixed damage, haste and raduis for Ko'kron Iron Star.
• Fixed a bug due to which Kor'kron Warbringer caused critical damage.
• Fixed a bug due to which Farseer Wolf Rider caused damage several times from the same star.
• Added immune to the 'knocking back' effect for Desecrated Weapon, and fixed visual radius and damage radius.

The Eye of Eternity:

• Fixed achievements Denyin' the Scion (10 player) and Denyin' the Scion (25 player).

Terrace of Endless Spring:

• Tsulong
  
  • Fixed a bug due to which Sunbeam did not remove Dread Shadows.

Throne of Thunder:

• Lu'lin
  
  • Fixed a bug due to which players could avoid using the ability Cosmic Barrage.

The Deadmines:

• "Captain" Cookie
  
  • Fixed a problem when food did not work in the heroic mode.

Spells and talents:

Warrior

• Taste for Blood will now apply only if Mortal Strike hit the target.
• Fixed an issue when Last Stand incorrectly increased the current health.
• Fixed an issue when Second Wind was not instantly removed if the hp was above 35%.
• Victorious will not proc after the kill Wild Imp, Lightwell and will proc only after the killing pets.
• Fixed an issue when Warrior could be affected Cyclone while Bladestorm, if they were applied at the same time.
• Fixed Glyph of the Blazing Trail.
• Fixed an issue, when spell Rallying Cry could not be applied on some players in the raid group.
• Mortal Strike now will not give rage at a miss.
• Mastery: Strikes of Opportunity now will not proc from Heroic Throw and Shattering Throw.
• Fixed Riposte.
• Fixed the dependence of Shield Barrier on the attack power.

Druid:

• Fixed an exploit with NPC Treant, summoned Force of Nature and allowing you to access the action bar of the NPC.
• Fixed an exploit with re-spec and spell Symbiosis, that was not reset when the specialization was changed.
• Fixed an exploit with operation of two spells at the same time Heart of the Wild and Nature's Vigil.
• Typhoon Now you can use even if the target is out of the druid's zone of visibility.
• Mastery: Harmony now will not proc from Frenzied Regeneration.
• Fixed an exploit with bug of the character's model with help Glyph of Stars and Incarnation: Chosen of Elune.
• The appearance of the druid will now change immediately after activation/removal Glyph of Stars.
• Fixed an issue when Ysera's Gift could not heal other players in a group.
• Fixed an issue when Ysera's Gift could heal a random players in a group instead of the most injured party or raid member.
• Now Ysera's Gift will be affected by modifiers and PvP-Power.
• PvP-Power will now affect Frenzied Regeneration.
• Savage Roar will now trigger the proc Predatory Swiftness.
• Teleport: Moonglade when reusing druid will be moved to the graveyard, nearest to the place of the first use.
• Play Dead now will not remove the combat.
• Fixed Glyph of Rejuvenation.
• Shapeshift Movement Speed now will apply automatically when leaving buildings, if player have 2 pieces of the set http://www.wowhead.com/item-set=-108...tors-sanctuary.
• Fixed invisibility loss for Wild Mushroom when moving.
• Fixed a bug due to which Treant (Force of Nature) could not have Resilience.
• Fixed an issue when Ursol's Vortex attracted the bosses.
• Fixed a bug due to which Ysera's Gift affected the Garrosh Hellscream and healed it by 5% of the maximum health.
• Fixed targeting for Treant (Force of Nature)
• Dream of Cenarius now will remove when getting the Eclipse.
• Increasing the movement speed from the druid's ability Stampeding Roar will no longer sums up with the similar effect of the cat form and travel form.
• Now Faerie Swarm can slow more than one target at the same time.
• Duration of Faerie Swarm now is 20 sec in PvP.
• Faerie Swarm now have 25% chance to reset the cooldown for Mangle, if the spell was used in the bear form.
• Copies summoned with Mirror Image now will cast Wrath.
• Fixed targeting for Treant (Force of Nature) .
• Fixed a bug due to which Treant (Force of Nature) used undefined on the bossed.
• Thrash and Thrash now will stack for the different druids.
• Sudden Eclipse now will proc when feared.
• Fixed an issue, when Cyclone removed the buff Soul of the Forest, if it did not affect the haste for Cyclone.
• Soul of the Forest will now remove yourself after use Wrath, instead of hit.
• Fixed amount of regenerated mana for Innervate.

Mage:

• Fixed a bug due to which Replenish Mana gave the mana twice.
• Frostbolt will be casted on the pet if the mage does not have a target.
• Combustion will no longer remove Heating Up, if the damage wasn't critical.
• Fixed a bug due to which some boss abilities remained on players when using Alter Time.
• Fixed a bug when buff Arcane Missiles could proc even in fire/frost specialization.
• Fixed a bug when Pyroblast! could be removed even if he was triggered while cast Pyroblast.
• Fixed Mirror Image, now he does not enter the combat instantly.
• Fixed a bug due to which Freeze applied Fingers of Frost at a miss.
• Fixed a bug due to which Freeze could be used while in control.
• Fixed a bug due to which Water Elemental continued to attack targets in control, which should be interrupted by any amount of damage.
• Fixed a bug due to which Rune of Power could not work.
• Fixed calculation to the bonus damage for spellIncanter's Ward while Dampening is active.
• Removed auto-attack for Water Elemental.
• Blizzard will now remove invisiblity from the target only after causing the damage.
• Fixed model for Rune of Power.
• Rune of Power now will not summon NPCs that hinder the game.

Warlock:

• Fixed a bug due to which the minion Wrathguard could use the abilities Legion Strike, Mortal Cleave, Axe Toss at the same time with Felstorm and Wrathstorm.
• Fixed a description of getting a demonic fury the combat log from the spell Legion Strike.
• Fixed exploit, when you could use two talents in 3 tier. For example Soul Link and Dark Bargain.
• Fixed a bug due to which Banish could be applied on a warlock at the reflexion with Mass Spell Reflection.
• Fixed a bug when after interruption the Sleep did not appear the cooldown on the spell and magic school.
• Spell Lock now can not be used if the pet is in control.
• Fixed work Unending Breath in conjunction with the ability Soulburn.
• Fixed a bug due to which pet's action bar resets at every new pet's summon.
• Seduction now will remove from the target the effects of periodic damage if the warlock has Glyph of Demon Training.
• Fixed duration of Curse of Exhaustion at use with Soulburn.
• Fixed a bug due to which spell Touch of Chaos could refresh aura Corruption, instead of extending by 6 seconds.
• Fixed work of bonus of 4 pieces of set Regalia of the Horned Nightmare.
• Fixed a bug due to which 10th spell Fel Firebolt of the minion Wild Imp could not deal the damage.
• Fixed targeting for Wild Imp.
• At the reflexion Soul Swap debuff will not apply on the warlock.
• If warlock missed the target with Soul Swap, then Soulburn will not be spent.
• Fixed speed of proc Wild Imps at the high haste.
• Corrected the dependence of damage on spell power for Incinerate at the active Fire and Brimstone.
• Fixed duration of Curse of Exhaustion in PvP.
• Fixed cost of summon of pets when Metamorphosis or Dark Apotheosis are active.
• Fixed damage Malefic Grasp.
• Grimoire: Felguard from the talent Grimoire of Service will now be learned only in the specialization "Demonology."
• Fixed a bug when spell Unbound Will could remove auras SPELL_AURA_TRANSFORM (for example: Illusion).
• Fixed a bug when Felguard and Wrathguard could not have the ability Threatening Presence, and Voidwalker and Voidlord could not have Threatening Presence.
• Fixed a bug due to which pets could cast spell automatically when Wrathstorm (or similar) is active.
• Fixed a bug due to which pet stopped following the target after cast Pursuit.
• Fixed loss of tics when using Soul Swap.

Death Knight:

• Fixed bugs due to which Asphyxiate did not trigger Dematerialize and could not be removed by Blink, Icebound Fortitude and Nimble Brew.
• Ebon Gargoyle summoned by Summon Gargoyle now can move while casting spells and following his target within a radius of 30m.
• Fixed displaying the effect of control in the in-game add-on "Warning of loss of control" for the spell Asphyxiate.
• Fixed displaying the effect of control in the in-game add-on "Warning of loss of control" for the fear effects.
• Outbreak, Plague Strike, Chains of Ice now will not remove Blood Plague, Frost Fever, Chilblains if the target is under aura SPELL_AURA_DEFLECT_SPELLS (for example: Deterrence).
• Fixed movement speed for Risen Ally (Raise Dead).
• Anti-Magic Shell now will prevent the imposition of the effect Freeze.
• Fixed Riposte.
• Reaping now will not give a rune of death if the spells from the list do not hit the target.
• Fixed Army of the Dead, now ghouls are using Claw.
• Fixed a bug due to which spell Death Grip did not work against the players.
• Fixed a bug due to which Risen Ally (Raise Dead) did not use his abilities.
• Fixed crit chance for Ebon Gargoyle.

Shaman:

• Unleashed Fury should not affect the damage Mastery: Elemental Overload.
• Fixed interaction the Grounding Totem with next spells: Dominate Mind, Mind Vision, Mind Sear, Chi Wave, Expel Harm, Gorefiend's Grasp.
• Fixed a bug when Grounding Totem could disappear, if the shaman escaped further than 30m from him.
• Stormstrike and Stormblast will stack for different shamans.
• Fixed damage for Lightning Elemental summoned by Item - Shaman T16 Elemental 4P Bonus.
• Fixed a bug when Primal Elementalist could not attack the target after summoning.
• Fixed a bug when the action bar Primal Elementalist resets at every new summon.
• Fixed damage for Primal Earth Elemental.
• Fixed a bug when Shamanistic Rage with Glyph of Shamanistic Rage at the dispelling undefined did not trigger Sin and Punishment and other similar effects.
• Spirit Link Totem will distribute the amount of health between targets located in the Cyclone.
• Shamanistic Rage with Glyph of Shamanistic Rage will no longer remove diseases, poisons and curses.
• Fixed the number of lightning jumps for Mastery: Elemental Overload triggered by Chain Lightning.
• Fixed problems with the combat when using Ascendance.
• Fixed crit chance for Fire Elemental Totem.
• Fixed double proc of Echo of the Elements.
• Stormlash Totem will now proc from the pet's strikes.
• Fixed a bug due to which Ascendance could proc under the control.
• Fixed the dependence of healing on the number of targets for Ascendance.
• Fixed a bug due to which Glyph of Purging and Glyph of Healing Storm could work in all specs.
• Fixed a bug when Shamanistic Rage с Glyph of Shamanistic Rage could remove shaman's buffs.
• Fixed a bug when Grounding Totem could not be destroyed after absorption Freezing Trap and Provoke.
• Fixed Glyph of Flame Shock.
• Fixed amount of regenerated mana for Mana Tide Totem.
• Fixed animation for Healing Tide Totem.

Hunter:

• Chimera Shot will now refresh Hunter's Mark and Serpent Sting.
• Mend Pet now will not reset the tick timer when reused.
• Lock and Load now will be removed after use Explosive Shot, insted of hit.
• Fixed a bug when Deterrence could miss spells having a flight time and casted before use.
• Fixed a bug due to which the talent Bestial Wrath removed control several times.
• Fixed a bug when Binding Shot could not proc if there were effects of fear on the target.
• The calculation of restoration of focus of pets is corrected.
• Fixed a bug due to which pet continued to attack the target with Scatter Shot.
• Fixed a bug due to which Hunter's Mark could not always be applied on the targets.
• Fixed a bug due to which Dire Beast did not take characteristics dynamically.
• Fixed a bug due to which Mastery: Master of Beasts did not affect the Dire Beast.
• Damage from Roar of Sacrifice now will not decrease with resilience.
• Fixed a bug due to which the base value of the attack power was higher than it should be.
• Fixed a bug when a pet was recalled, the aura of the pet remained on the player.
• Fixed a bug when after the end of the effect Stampede the buffs were removed from the hunter.
• Haste will now affect the duration of Barrage.

Priest:

• Fixed the dependence of healing and damage on distance for the spell Halo.
• Fixed proc Surge of Light from Prayer of Mending and proc chance for Divine Star.
• Haste and auras of the owner do not affect the casting speed of spells Psyfiend.
• Lightwell will not heal foreign players if they are in a duel.
• Psyfiend now can be a target for Freezing Trap.
• Fixed work of Leap of Faith if a the target is under the control.
• Lightwell now can cause critical healing.
• Fixed a bug due to which Dominate Mind could absorb any spells.
• Mass Dispel can no longer remove Glyph of Ice Block.
• Fixed a bug due to which Lightwell did not work for all members of the raid.
• Dominate Mind will remove Spell Reflection and Mass Spell Reflection.
• Fixed exploit allowing to take in control Vermillion Sentinel using Dominate Mind.
• Fixed bug due to which it was impossible to use Dominate Mind on players on mounts.
• Fixed a bug due to which Mass Dispel while having Glyph of Mass Dispel also removed Glyph of Ice Block.
• Wixed work Leap of Faith with control effects.
• Fixed a bug due to which Mass Dispel while having Glyph of Mass Dispel worked at a very short distance.
• Fixed a bug due to which Spectral Guise could be removed by Arcane Brilliance.
• Fixed a bug due to which Guardian Spirit did not work while having Ring of Frost.
• Fixed a bug when Psyfiend could ignore Grounding Totem and Feign Death.
• Fixed a bug due to which Rapid Renewal could ignore Dampening.

Rogue:

• Reworked Vanish
  - No longer allows you to catch control / any other spells using a spell.
  - Implemented mechanics of delaying the invisibility, due to this, other players see the rogue for some time after the application of the ability.
• Fixed cast interrupt with ability Distract if the target before this was in control.
• Fixed work of Cloak and Dagger after use Shadow Dance.
• Fixed a bug due to which Shuriken Toss could proc even when the player was in control.
• Fixed accumulation of charges Anticipation from Mutilate and Dispatch under the auras Seal Fate and Shadow Blades.
• Fixed work Seal Fate from spell Mutilate.
• Fixed accumulation of Anticipation, when the rogue had less than 5 Combo Points.
• Fixed proc of Subterfuge: should proc from Typhoon and should not from Symbiosis, Growl and Stealth.
• Fixed a bug due to which Shuriken Toss could not trigger Subterfuge and did not remove the invisibility.
• Fixed work of bonus of 4 pieces of set Barbed Assassin Battlegear.
• Fixed proc chance Blindside.

Paladin:

• Glyph of Flash of Light removes when healed by spells: Stay of Execution and Lay on Hands.
• Guardian of Ancient Kings will not beat the targets that are in control.
• Seal of Justice will now proc from the auto-attack.
• Fixed a bug due to which Light's Beacon did not work for the all raid group.
• Fixed crit chance for Guardian of Ancient Kings.
• Seal of Truth will proc from Judgment.
....


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