This is mainy a visual issue, but it also affects gameplay, since turn rates and facing angles matter.

1. Pick Earthshaker, level up Enchant Totem and get Aghanim's Scepter
2. Cast Enchant Totem on the ground behind you (make sure the targeted point is within cast range so ES doesnt need to move to get in range)

Result: Earthshaker starts turning around to cast the spell. He has to turn since the targeted point is behind him and not within the required facing angle. As soon as the angle is enough, he starts leaping. However, his facing angle "freezes" as soon as the leap begins. He does not finish fully turning towards the targeted point. This causes him to leap sidewards and land sidewards.

Expected: While leaping, Earthshaker should continue to turn until he faces exactly towards the targeted point.