I have always seen those mass CTD's while playing PR, and I was never affected by them.
Recently I started using mumble more, and so I tried the mumble overlay. Later, while playing, I was affected by a mass CTD, for the first time ever.
After playing around with my own private server, I found that 100% of the times I requested a PBSS from a client with mumble overlay, it would immediately crash that client, and 100% of the times that same client had mumble overlay OFF, it would take the PBSS as normally.
So I came to the conclusion, that whenever the server automatically take a PBSS from everyone, those with mumble overlay get a CTD.
I thought I'd share this and maybe this could be fixed to avoid mass CTD's.
Cheers.


