I downloaded a new EP that has a WAVEFORMATEXTENSIBLE_CHANNEL_MASK tag embbeded.
This new album is causing a 1-3s freeze when opening it (from albums view) to see the tracks contained, or when editing the tags (artist, album, lyrics, etc.). Music sounds fine, no glitchiness, but changing tracks is similarly very laggy.
The album in question is
this.
MB 3.1.6510
Slightly unrelated, FLAC had some real trouble getting any compression done on these tracks. Usually I can get 50-40% reduction in file size, but with these I was looking at 20-10% reduction.