Comment 7 for bug 1921306

This smells like a known QEMU issue that we encountered in CI a while ago causing the underlying guest to crash:

[QEMU] Back-n-forth live migration of a paused VM results in QEMU crash with: "bdrv_inactivate_recurse: Assertion `!(bs->open_flags & BDRV_O_INACTIVE)' failed."

https://bugzilla.redhat.com/show_bug.cgi?id=1713009

You should see the above error captured in the guest log under /var/log/libvirt/qemu/$domain_name.log

Marking this bug as invalid for Nova but feel free to add the QEMU project in assuming you're using the Ubuntu provided package.