Hi Ian,
I am still seeing this issue on my newly built system with 22000.434 that does not even have any DVD or Blu-ray drives. Will play around with it some more. Suspect fg is correct in just mounting ISO images and the OS not dismounting properly could be one of the concerns.
Have a great week guys. I have like eight virtual machines to put together on new system. That will probably take me through to next week. I finally put the last SSD drive in just for the vm's. Longest build in my life π€£
Regards,
Johnny