Constant crashes in multiplayer

Not sure what is causing it, but when playing in a party, I crash every 5-15 minutes. Usually it's "deadlock", or just CTD. Doesn't happen at all, or nearly at all (once every 6 hours?) when playing solo.

Nothing in logs that would point to crashes. Tried steam's verify integrity, now download, no changes.

https://imgur.com/a/qiyALvk