This one is hard to explain but I'll be moving around and then my character seems to get "stuck" in that he stops moving. The only way to start moving again, is to stop (take my hands entirely off the mouse) and then start again. It sometimes happens where I'll be moving in one direction and then my character gets stuck trying to move in a direction I wasn't going (like in the main city hub, it happened to me while I was walking from the portal to the jeweler. Character got stuck midway and tried walking in the direction of the castle).

I hope that helps explain it.