ovmf uefi

Greetings. I've got a few OVMF firmware VMs with hardware serial ports being passed through (ttyS) mostly successfully. The issue I am running into is when the VM reboots it outputs to the serial port and receives responses causing the VM to enter various menus. I think I've found the settings...

I have a Windows 10 VM that was working at some point earlier this year, that now will no longer boot. The host was running PVE 7.x when it last worked, but has received updates to PVE 8.3.1 in the intervening months. The OVMF(UEFI) doesn't show any of the disks any more. If I boot the Windows...