Fix stopping slot animations and playing the same frame

#1927

Source/Engine/Level/Actors/AnimatedModel.cpp

@@ -494,6 +494,7 @@ void AnimatedModel::StopSlotAnimation(const StringView& slotName, Animation* ani
         if (slot.Animation == anim && slot.Name == slotName)
         {
             slot.Animation = nullptr;
+            slot.Reset = true;
             break;
         }
     }