There's references to this issue in the Topton thread, but figured I'd post in here in case others with this box are having issues. The N6005 CPU and Proxmox does not jive well for VMs. I was getting consistent crashes of my OPNsense VM until I upgraded the microcode to revision 0x24000024 (probably the only fix since I doubt we will see any BIOS updates). More info here and instructions on how to upgrade the microcode here. This solved my problem and works fine with the default kernel on latest Proxmox 7.3, but I also upgraded to the opt-in 6.2 kernel recently.