TC Ports:

Core/Misc: 522f537048 followup (https://github.com/TrinityCore/TrinityCore/commit/9a57e95f102a9d35ac8416d02e24c0dddbc755ed)
Core/CreatureAI: b6b0353bff followup (https://github.com/TrinityCore/TrinityCore/commit/5d411e0b21b1f1a4653d274d9b1cc7fef17f232b)
Core/Spell: move creature focus (https://github.com/TrinityCore/TrinityCore/commit/8c12f36915b2fddd48a5e4c9244c2b0498a64ae9)
Core/Unit: 2170541a51 followup (https://github.com/TrinityCore/TrinityCore/commit/2d4549023a6655d19671f7f7e6b4f7c9b71ae632)
Core/Misc: cleanup SetInFront uses (https://github.com/TrinityCore/TrinityCore/commit/104e745edfb89f95e34cad7840eae0b6e183bf94)
Core/Unit: 229444b74a follow-up (https://github.com/TrinityCore/TrinityCore/commit/6a96addadd5dea633b3066b8d0427302ba514364)
Core/Unit: revert 3ea46e57af (https://github.com/TrinityCore/TrinityCore/commit/a46286a803b41b375ed9352858c742626bb85720)
Core/Scripts: remove OnDummyEffect hook/sOnDummyEffect ai hook (https://github.com/TrinityCore/TrinityCore/commit/1929ca3aa14f6cd83ea3ac9d7e8c0e2ed0e87a26)
Core/Entities: moved PetAura handling to Player where it belongs (https://github.com/TrinityCore/TrinityCore/commit/4f6d38fe9d5c07e6e8eb88e517af71b6cdc4f9f8)
Core/Spells: Fixed Chilled to the Bone (https://github.com/TrinityCore/TrinityCore/commit/08635c740a7ee04da9b0cd5045075a9432121b06)
Core/Spell: implement pvp trinket immunity against Judgement of Justice (https://github.com/TrinityCore/TrinityCore/commit/05ba662d5daaa3428cc01cdaa3794bf5a073ef17)

Source/Game/Entities/Unit/Unit.Spells.cs

@@ -30,11 +30,6 @@ namespace Game.Entities
     {
         public virtual bool HasSpell(uint spellId) { return false; }
 
-        public virtual bool IsFocusing(Spell focusSpell = null, bool withDelay = false)
-        {
-            return false;
-        }
-
         public void SetInstantCast(bool set) { _instantCast = set; }
         public bool CanInstantCast() { return _instantCast; }
         
@@ -1388,7 +1383,12 @@ namespace Game.Entities
             return 0;
         }
 
-        public bool IsMovementPreventedByCasting()
+        public virtual bool IsFocusing(Spell focusSpell = null, bool withDelay = false) { return false; }
+
+        /// <summary>
+        /// Check if our current channel spell has attribute SPELL_ATTR5_CAN_CHANNEL_WHEN_MOVING
+        /// </summary>
+        public virtual bool IsMovementPreventedByCasting()
         {
             // can always move when not casting
             if (!HasUnitState(UnitState.Casting))
@@ -1401,9 +1401,6 @@ namespace Game.Entities
                     if (spell.GetSpellInfo().IsMoveAllowedChannel())
                         return false;
 
-            if (IsFocusing(null, true))
-                return false;
-
             // prohibit movement for all other spell casts
             return true;
         }