LAN unresponsive after firmware upgrade

[Neil Mistry]

I set up OPNSense on a  Lenovo ThinkCentre M720q Tiny (Intel Core i5-8400T, with 8gb ram) back in May with a GLOTRENDS LE8245(A3) amazon .  Was working great until a week ago when I updated to OPNsense 26.7.4_1-amd64, FreeBSD 15.1-RELEASE-p3, OpenSSL 3.5.8. 

When I first upgraded within a hour I had to reboot as all LAN devices lost wifi.  A week later in this is happening frequently.  I can still reach the OPNSense box through wan (tailscale), but all lan devices lose wifi.  I reboot and works for some time. 

In the logs, I do not see any errors under 'System > Log Files > General', except the weekly '2026-08-25T02:31:09Erroropnsense/usr/local/etc/rc.linkup: Interface lan tracking nonexistent interface wan'.

I installed the plug-in 'os-realtek-re', issue still persists.  My connection is PPPOe with a vlan that my ISP requires, modem is a simple media converter box (optical to RJ45).  How do I diagnose and fix this?  Worked with no issues over 4 months before upgrading.