Why did some of my Artist metadata in Music change?

Just to mention what I already tried:
1 plex dance
2 Even tried to delete and recreate all of the music libraries in PLEX (now 3 of the 24 libraries I had can not be deleted anymore!!!)
3 Used EDGE instead of CHROME
4 Recreated all ID3 tags (also using %interpret% instead of %artist%)

no success - the problem is PLEX made. It does recognize all of my id3 tags correctly as we can see in other sorting combinations and views (list view is OK), but in this peticular sorting AND/OR view it doesn’t.

Screen shot showing correct recognition of ID3 tags in “list view” with sorting artist/title. Please note that there is no view changer icon anymore (change between list view and poster view) on this page, (while on some other sorting views there still is):

@PLEX employees: is it possible that there is a mismatch between the used variables for interpret, album interpret, artist, album artist, composer in different sorting options and/or views?