Occasionally (maybe once every couple days) my alt will appear to stop moving.

For example, my alt is following my main and when it de-syncs it appears to stop moving on my main screen. I can still kill things with both, but on the main character's screen it looks like there's nothing there. Opening the map on the main shows the alt still sitting wherever it was when it de-synced. The only way I've found to fix it is to relog.

Not sure if I'm explaining it well enough, I'll try to take screenshots of it when it happens again.