I've had this happen myself on Chrome, but it only happened for 1 night then never happened again, so I assumed it was just me. As for the switching targets part.... this only happens if I'm blinded/confused. Confused seems like a 50%/50% chance to successfully make my target cycle, so when it doesn't I don't think I'm confused and I go to switch targets and I can't.
I don't have a lot of time to play but I just logged in for a minute and this was happening to me on Chrome.
As stated, I didn't play for very long, but the game is completely playable for me, and the only current issue I'm having is the sound build up.