Core/Spells: Fixed logic related to movement while channeling

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

@@ -1382,14 +1382,20 @@ namespace Game.Entities
             return 0;
         }
 
-        public bool CanMoveDuringChannel()
+        public bool IsMovementPreventedByCasting()
         {
+            // can always move when not casting
+            if (!HasUnitState(UnitState.Casting))
+                return false;
+
+            // channeled spells during channel stage (after the initial cast timer) allow movement with a specific spell attribute
             Spell spell = m_currentSpells.LookupByKey(CurrentSpellTypes.Channeled);
             if (spell)
                 if (spell.getState() != SpellState.Finished && spell.IsChannelActive())
-                    if (!spell.GetSpellInfo().IsMoveAllowedChannel())
+                    if (spell.GetSpellInfo().IsMoveAllowedChannel())
                         return false;
 
+            // prohibit movement for all other spell casts
             return true;
         }
 

Source/Game/Movement/Generators/FleeingGenerator.cs

@@ -40,7 +40,7 @@ namespace Game.Movement
             if (owner.HasUnitState(UnitState.Root | UnitState.Stunned))
                 return;
 
-            if (owner.HasUnitState(UnitState.Casting) && !owner.CanMoveDuringChannel())
+            if (owner.IsMovementPreventedByCasting())
             {
                 owner.CastStop();
                 return;

Source/Game/Movement/Generators/RandomMovement.cs

@@ -86,7 +86,7 @@ namespace Game.Movement
 
         public void _setRandomLocation(T creature)
         {
-            if (creature.HasUnitState(UnitState.Casting) && !creature.CanMoveDuringChannel())
+            if (creature.IsMovementPreventedByCasting())
             {
                 creature.CastStop();
                 return;

Source/Game/Movement/Generators/TargetMovement.cs

@@ -64,7 +64,7 @@ namespace Game.Movement
             }
 
             // prevent movement while casting spells with cast time or channel time
-            if (owner.HasUnitState(UnitState.Casting) && !owner.CanMoveDuringChannel())
+            if (owner.IsMovementPreventedByCasting())
             {
                 if (!owner.isStopped())
                     owner.StopMoving();
@@ -144,7 +144,7 @@ namespace Game.Movement
             if (owner.HasUnitState(UnitState.NotMove))
                 return;
 
-            if (owner.HasUnitState(UnitState.Casting) && !owner.CanMoveDuringChannel())
+            if (owner.IsMovementPreventedByCasting())
                 return;
 
             if (owner.IsTypeId(TypeId.Unit) && !target.isInAccessiblePlaceFor(owner.ToCreature()))