I ran into the same panic and investigated further, with some help from Franco. I've raised FreeBSD bug and proposed a patch in the cxgb driver to fix the issue. That fix has been accepted by the upstream maintainer, and committed to FreeBSD 15.0, with a planned backport to 14.x.
As Franco suggested in OPNSense issue 224, I've submitted a pull request to OPNSense with the same fix, so we may see it sooner in OPNSense 24.7 than in FreeBSD 14.
As Franco suggested in OPNSense issue 224, I've submitted a pull request to OPNSense with the same fix, so we may see it sooner in OPNSense 24.7 than in FreeBSD 14.