I'm not sure if this goes under technical issues, but wasn't sure of where else to put it.
Last night I was playing with a friend in one of the zombie tier 3 areas. I picked up the key, which summoned all the zombies, and then suddenly hit lag (real lag, as I was down to 1 red bar, not graphical lag). I tried to put the key down and it got stuck to the back of my character. I couldn't raise my shield or attack, and only after my lag normalized did my character put down the key.