I’m not sure what the cause was or what steps could be take to reproduce it as I only had it happen once.
I was playing a match made objective game on Train Yards as proxy, then after one of my deaths I got the usual “Press space to re spawn” prompt, trouble is pressing space did noting so I was stuck watching my team mates play.
I tried changing class and swapping teams to see if that would fix it but none of that had any effect.
In the end I had to quit the match.