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Nova instance crash after reattaching volume

I recently realized, that there is problem with my demo installation (Ocata) I have ceph-backed instances (boot from volume only, no ephemerals).
When I create a new empty volume, attach, detach and attach again - in most cases instance crashes. Sometimes with second or third try. In a few cases it was already at first attach.

Looks like bug in qemu/libvirt connected with Ceph storage.

Anyone had something similar?