1) When viewing the Tag Inspector on some files containing "Involved People List" in both MP3TAG and MusicBee, things are fine. However, in the Tag Editor, the list is duplicated as below...
engineer:Yasuo Higashidate;engineer:Fuyuhiko Inui;engineer:Satoshi Kumasaka;engineer:Gen Okamura;producer:Yuka Akiyama;producer:max matsuura;producer:Naoto Suzuki;arranger:菊地圭介;mixer:Dave Way;;\sengineer:Yasuo Higashidate; engineer:Fuyuhiko Inui; engineer:Satoshi Kumasaka; engineer:Gen Okamura; producer:Yuka Akiyama; producer:max matsuura; producer:Naoto Suzuki; arranger:菊地圭介; mixer:Dave Way;
What appears to be happening is that MusicBee references the list in the tag, and if there is no line break (possibly) between the role and the person involved (happens even when there is only one role:person;), some weird stuff happens and it recreates the list. Sometimes it only displays improperly in the Tag Editor, but other times it rewrites the tags incorrectly as well. This began when I set the "Involved People List" to the Custom Tag.
2) I'm not sure why this is occurring either, but I sometimes when I save information in the Tag Editor, MusicBee duplicates the embedded album cover art. This has been happening for a long time, but I'm not sure if this happens each time a tag is saved. It did just happen to four tracks I saved, however.