This is probably not a kernel problem. Let's downgrade pve-qemu-kvm to 6.0.0-4 version. Download from there and install with dpkg.
http://download.proxmox.com/debian/dists/bullseye/pve-no-subscription/binary-amd64/pve-qemu-kvm_6.0.0-4_amd64.deb
That helped me. I am waiting for a new version of...
