Might be a bug in vyos … discovery.php was hanging and return timeouts.
After snmpd restart on vyos, everything appears to be fine, for some reason snmpd consumed a lot of memory.
I’m not sure if my issue was the same but noticed all the ports went missing. I changed the port_association_mode to ‘ifDescr’ then did a discovery and all the ports showed back up.
Had a lot of them to update so just did it in the DB directly: UPDATE devices SET port_association_mode = 3 WHERE os = 'vyos';