This is maybe a duplicate of https://bugs.launchpad.net/qemu/+bug/1714331 ... could you please try a newer version of the OVMF firmware (if you're using it)?
This is maybe a duplicate of https:/ /bugs.launchpad .net/qemu/ +bug/1714331 ... could you please try a newer version of the OVMF firmware (if you're using it)?