In the mission Hanging by a thread i encountered a bug.
just before the elevator went down i died, the respawn and the elevator countdown were almost equal.
when we went down in the elevator the character was spawned (hans) but i couldnt control it as if i still was dead.
in the video below you can see it.

https://youtu.be/eL-xCGgcQGY

after we survided it also didnt spawn me in.
the enemys did attack hans when i wasnt controlling it.

hope this is helpfull to fix the bug