Core/Transports: Initialize stoppable transports at start of path

Port From (https://github.com/TrinityCore/TrinityCore/commit/37c374c49fc287d8a4b1c0a6c5d4a202599b9b09)

Source/Game/Entities/GameObject/GameObject.cs

@@ -3609,6 +3609,12 @@ namespace Game.Entities
                     }
                 }
 
+                if (!_stopFrames.Empty())
+                {
+                    _pathProgress = 0;
+                    _stateChangeProgress = 0;
+                }
+
                 _positionUpdateTimer.Reset(PositionUpdateInterval);
             }