With bridges it gets connected a little bit faster (it’s still random) and it loses connection quite often (like it does without bridges), i. e. there are still popping up all these blocked addresses, to the point I can’t even update/upgrade the system for the first time.
Thank you for all the answers so far, by the way! Appreciate it.
Little update: Just to rule out something weird on the host side I put a fresh Debian stable install on another set of hardware and it’s exactly the same there. shrugs
Almost forgot: AFAIA they change when you switch bridges? Still, tried it with a deleted state file; no difference.