Ever since early on during the launch of Guild Wars 2, players have randomly experienced a movement bug caused when trying to interact with an object while on the move. Instead of interacting, the character will take off in a straight line, unresponsive, and sometimes even plummet to their death. This bug can be caused by both using Auto-run and by moving manually. ArenaNet has finally taken notice of the bug on the official forums:
Originally posted by Jason King (Source)
We’re currently working on a fix for this bug, but we don’t have an ETA yet. Thank you for your patience!
In the same thread this response was made, a few players have also came up with a few tips for players having difficulty with this bug. One suggestion made was to quickly press the movement keys in order to stop the unresponsive behavior. Another suggestion was to release the right mouse button if it is pressed while trying to interact with an object. Stopping movement while interacting may also do the trick, but some players have also reported the bug while not moving forward.