Hi, and thanks for this great app!
Overall I'm enjoying it but I'm surprised no one reported a bug that I can reproduce on any file, at least on my configuration (M1 Macbook running Ventura 13.6.4 / Mp3tag 1.8.13). My test files are Mp3, mainly with ID3v2.3 tags.
When I have lyrics in a file, if I change any tag of that file with Mp3tag and go back to Apple Music, the lyrics are displayed with a line break after each line. If I edit the lyrics in Music (just by adding a letter then erasing it for instance), lyrics are back to normal.
For instance, lyrics in Music before tag edition in Mp3tag:
Same file, after editing the title in Mp3tag:
I am the only one with this issue?