[tor-relays] [NYX_NOTICE] Relay unresponsive -- how to troubleshoot?

I keep getting NYX_NOTICEs about "Relay unresponsive". They happen every few hours, and last for minutes or sometimes a couple of hours before I get a "relay resumed" message.

But, I don't see anything in the actual Tor logs to indicate that anything is wrong. Does anyone know how best to troubleshoot this? I *think* it's impacting my consensus weight and making it drop, and is keeping me from getting the Guard flag.

This is the relay: https://metrics.torproject.org/rs.html#details/94626BD21119568EB301D1E7677B2...

Thanks for any tips!