I was just out looking for some candy on a clockworks level (solo) when I suddenly got drug to the left. It was not like a stuck key. It was violent and hurky jerky. I was drug across a party button before I was ready, then I got booted with a Steam Authentication Error. I got back in, but was on the wrong side of the the party button gate & could not go look for my candy. Very crazy and annoying. I ended up ditching the run and starting over.