We have Tor on the relay open as much as possible, there is no specific blocking.

But there is spam and DDoS coming from Tor on the relay and certain IPs and datacenter might get blocked due to that. I assume if you get one of those nodes then there might be a problem.

Opening every restrictions on the firewalls is not possible because then attacks will make it hard to use for everybody.

Does somebody else currently see this issue? because it works for my tests.

Would you be willing to debug this with us/me?