I've been using the excellent MP3Tag for many years to tweak the tag data and manage my music collection, ripped from my CDs using dbPoweramp. I use AAC (for portable player use) and FLAC exclusively (not MP3). When I tried Groove after updating to Windows 10 last week, it found all the files just fine, AAC and FLAC, but none of my album cover art is displayed by Groove. The album art is embedded in the tag data.
The tag data is still there. iTunes (cough), Zune and the venerable WMP all still show the album art. MP3Tag and Squeezebox still show the cover artwork.
Groove does seem to have a problem reading artwork from the tag data embedded in the file.
Any further ideas?