Hello, I experienced a bug when playing Ascension with one friend who was hosting.
On round 29 we killed everything but the round wouldn't end, we searched high and low, rebuilt every barrier and couldn't find anything.
Eventually I discovered that every 15 minutes, there would be a hellhound that ran through this specific part of the map but midair and would have no problem running through walls. It would eventually run out of the map into the emptiness and would eventually (15 minutes later) come running from where it started. So it was making laps. It seemed to be invulnerable as well since neither my Ray Gun nor my Thundergun were effective in dispatching it, not to any degree at all.

It completely stopped us from continuing to play and eventually I inexplicably died and experienced a Game Over. I had Who's Who but it didn't activate so I basically just died for no reason. At this point my teammate had bled out already so maybe I instantly died because the game wants to prevent players from griefing others by prolonging the game or maybe I died because I hadn't killed anything in the round for too long. I have no idea.

tldr: hellhound had noclip on so i couldnt kill it, randomly game over'd after maybe an hour