While I was attacking some bad guys I was jumping about trying to get into cover and managed to get half stuck in a box, I was still able to jump out of the spot I was in after a few attempts which doesn't make this a severe bug by any means. The glitch is easily repeated by continually jumping into said box which then causes your character to float in mid air until you jump about which realises the character. I believe this is something to do with the physics collision detection, I have done my best to demonstrate the bug in the images below (difficult to see):