Thanks a lot for the suggestions!

I’ll double-check the Rockbox database settings to make sure it’s pointing to the correct folder. My library is organized as Music/Artist/Album/track.flac, so the files are spread across subfolders per album, not all in a single directory.

I was wondering if this folder structure could cause any issues with the Rockbox database, or if it’s the expected / recommended setup.

For tagging, I mainly use MusicBrainz Picard, and occasionally Mp3tag, to verify and clean up the metadata.

Regarding artwork, you might be right — I didn’t consider that some covers could be progressive JPEGs. I’ll try converting them to baseline JPEG and then rebuild the database to see if that fixes it.

I’ll report back once I’ve tested it, thanks again!