SteamDB has the depot they updated the game to also listed as emergency_patch1 or something like that with a note in regards to "Hydra" which after some Googling they appear to be a online service, I guess some of the netplay related functionality was being wonky and that's why it was patched.
I backed up the old game exe though as that was the only file modified so it was easy enough to back up the new exe and then restore the old one though if you don't then Steam isn't the easiest software to work with to re-download previous updates but it can be done.
(Steam Previous Patch Console or something like that in Google should bring up a guide for how to go about it if needed, sticking the URL directly into the post here would probably trigger the spam guard.)
Hi man, i have the same problem with the huge stack. Let me know if you find a way around this (other than starting a new game 🤔 )