I have 3 servers running off of 1 machine, ports 2302,2402,2502. These servers have been running without issue for several months now, but last night the server on port 2402 stopped showing up in the community server browser. Players can still connect direct via IP:2402 as long as their mods are set up.

I attempted to troubleshoot by starting a new (fresh, vanilla) server, but any servers I create do not show up in the browser. If I make a copy of one of the visible servers (changing the server port, name) the copy does not show up in the browser.

Adding

Ports are all forwarded and have been working for months now.