As always, it primarily depends on the underlying hardware (CPU/BIOS patch level).
The Intel Xeon E5-2630 v4 is 10 years old (and as new not very fast...) :rolleyes::oops:
Same issue again yesterday.
This is not really "Enterprise" or "High availability".
There must be an option to manually remove the stalled flecing-image without stopping the related VMs.