I ran 6.11.5 for months without a single hiccup. 6.12.3 has not been stable for me and will hard crash. The server will not respond to ping or ssh. No hardware changes in the past year. The only thing that changed is the software. I noticed a call trace in the logs this morning having to do with macvlan. Please see attached diagnostics. I've since enabled the syslog server to try and capture the crash event itself.
The only thing I've noticed that might trigger this is using a WireGuard tunnel. I have a few peers configured as "Remote access to LAN" which seem to work fine. I have a single connection configured for "Remote tunneled access" from my iPad. The last few times the server crashed has been shortly after using that connection.
tower-diagnostics-20230816-0804.zip