It looks like i've got the exact same issue;
drwxr-xr-x. 2 vdsm kvm 4.0K Mar 29 16:01 .
drwxr-xr-x. 22 vdsm kvm 4.0K Mar 29 18:34 ..
-rw-rw----. 1 vdsm kvm 64M Feb 4 01:32 44781cef-173a-4d84-88c5-18f7310037b4
-rw-rw----. 1 vdsm kvm 1.0M Oct 16 2018 44781cef-173a-4d84-88c5-18f7310037b4.lease
-rw-r--r--. 1 vdsm kvm 311 Mar 29 16:00 44781cef-173a-4d84-88c5-18f7310037b4.meta
Within the meta file the image is marked legal and reports a size of SIZE=41943040,
interestingly the format is mark RAW, while it was a thinly created volume.
My suspicion is that something went wrong while the volume was being livemigrated, and
somehow the merging of the images broke the volume.