PSA For anyone thinking about flashing this custom firmware on a 4-Bay WTR Pro 5825u DON'T DO IT!!!! You will brick your device like I did. Mercifully, I was able to restore my device to working condition by flashing an official Aoostar BIOS...
OK, I've found the trigger for this problem. This happens when I pass through the SATA Controllers on my WTR Pro in ProxMox. FWIW, I am running kernel 6.11.11-1-pve but the same occurs on 6.8 also.
When I stop all VMs, removed the config that...