When viewing a tag that has a comma in it, such as https://musicbrainz.org/recording/731f2908-05d2-48a8-b042-11bba6eebb2b ("I Am Hers, She Is Mine"), it appears as "I Am Hers,She Is Mine", with no space between the comma and the next word. This happens across other fields, such as the album title too (https://musicbrainz.org/release/6569c175-1840-4dd9-8a00-371b1f4c4e20). It also strips any spaces that existed in previous/existing tags as well.