animation not shown at height

[chasin225]

Hey im having a weird bug. When my unit walks backwards and she is going up or straight then the animation is shown, but when shes going down the animation is not shown (she gets invisible). So i tested this in another map (named archerbug) and the animation is not shown at all. Any idea's what causes this?

edit: I found out that the visibility of the animation depens on the camera angle. But I still dont know how to fix this