The instance has been updated to the latest version of the code. For the next few hours, there might be issues with communication in the fediverse. We are working on it, and everything should return to normal shortly. I'll keep you updated.
https://kbin.social/m/kbinDevlog/t/613299/kbin-RTR-8-The-update-of-kbin-social-and-plans-for-the
Yes you can block them. The issue with other content vanishing when domains were blocked by individual users has been fixed by this update.
Whole domain is blocked for me, no issues:
I will check what's going on.