Yes I've had it happen. You look like you're hovering, and you can't use any casted abilities, or use your ooc heal. It's very frustrating.
I am not hovering, my character is stuck running forwards or backwards and I cannot cast anything with a cast time due to being stuck moving. Basically autorun super turns on and won't turn off, turning on auto run just makes me stand in place. It is in the game application only because alt tabbing does not press the S or W key repeatedly.