@noris Just one more bit of information. After upgrading to build 536, I upgraded my Linux firmware to the most recent version, but I experienced the loss of many albums upon rescanning. I then downgraded to Linux 4.19.x. The scanning problems became less severe, but did not become completely stable as they had been before 536. I now need to rescan several times to recover all my albums. The swings have been as great as 20 or 30 albums.
Addendum: After a bit of time, all is a bit more stable with Linux firmware 4.19.x and build 536. Swings are +/- 10 to 15 albums.