Board Thread:LotR Mod Technical Support/@comment-37.52.209.172-20170622060156/@comment-25330335-20170622141345

Sparkius is right. Animals (mounts) are calculated serverside, which includes movement. That means that all that info has to come and go to and from the server over your internet connection. It's a vanilla bug, so there's nothing Mevans can do about it.