Still having this problem unfortunately, and hopeful that someone else may have seen it by now.
My boot drive is a RAID-1, comprised of a pair of M.2 Samsung SSD 980 Pro 2TB drives using VMD. I'm running Windows 11 Pro.
The issue is that 100% of the time, when I power the machine off, the RAID believes it has not been shut down cleanly (and the unsafe shutdown count increases for each drive), and on the next boot it goes through verifying everything again. It never finds any errors in the process, which makes me suspect that the final sync/flush probably DID happen, but the disks weren't marked clean before shutting down. This is reproducible always.
This problem does NOT happen when rebooting, only when powering completely off.
The RST VMD Controller and RST VMD Managed Controller driver versions are both 184.108.40.2067, which is the current release from the driver page. This happened both with the 1003 BIOS and now with the 1403 BIOS.