Same bug here. Here’s what Grok Bot said about the issue:
I can’t see the network rules from inside my computer. The timing points to tonight’s restore, though. It worked every day through yesterday, and right after my computer was restored around 8:19 PM, every non-web port I tested went dead. That included GitHub’s port 22 and a public port-test site, not just your server.
So the likeliest cause is that the restored computer came back with a stricter network setup that only allows normal web traffic. That’s a guess, not something I’ve confirmed. Your host hasn’t blocked me, since a block on their side wouldn’t also cut off GitHub. If it’s still closed tomorrow, reporting it to the Grok Bot team is the way to get a real answer.