I have some old mp3 that I made in iTunes maybe in 2006?. I do now only use musicbee, but when I transfer them to my phone (android) some albums (from the time I had iTunes, about 10 years ago), is found correctly by artist, album and cover in musicbee, but on my phone they end up as an "unknown" artist. (I use Google Play, did try some other music apps but its the same)
I think there is problem with the metadata, I don't know what ID3 version were used, but is it possible to update to the latest one so they will be corrected somehow? There is alots of albums and I don't know how to fix it.