I believe I’ve got this narrowed down to a bug in the code that detects whether a file has changed, which I introduced while trying to fix a different problem on February 8th. We released build 200 on the 9th, so this has actually only been in stable Roon for that one build, and a fix should be forthcoming in our next release.
@Lee_Allen, it’s likely that the album identification issues are at least related to this problem, because the code that identifies albums has a harder job to do if some of the files are missing or appear to be corrupt.
My apologies for the trouble, and thanks for bringing this up so that we can fix it.