I'm now having a repeated issue where I get OPNsense stable after rebooting (stable meaning, I get IPv4 and IPv6 running without interuption; IPv6 will still initially drop connectivity after 40 minutes or so after a reboot; I then save the LAN interface, and it starts working again without doing anything else). And after a few days or so though, the entire LAN interface just drops, IPv4 and IPv6. Nothing I can do on the firewall (restarting configd, restarting all services, etc) seems to help it. I always have to reboot. And then I have to get it stable and this lasts a few days. Quite irritating, but understand this is a free product. Not being demanding of a fix. I just may have to fallback to a more stable firewall product, but I love the features OPNsense has.
Did you solve the problem?
Similar issue here with 23.1.11.
Suddenly LAN interface and all VLANs lose the connection. Log file is showing that the link states changed to DOWN. >:(