Movement in general seems pretty buggy. My grab button will randomly get stuck, and that'll cause me to stop moving cause the game thinks I'm trying to grab. Pressing tab just gives me a giant string of a's when this happens.
It's super annoying since I've got to constantly restart the client when this happens.
But yeah, the game seems to want to just forget keystrokes or button presses sometimes which becomes a pain and makes playing the game difficult, especially if it's some competitive pking :[