I'm using Windows 7 64bit, and MusicBee 3.2.6902 (latest version as of now)
When I try to embed a synchronized lyrics (auto loaded from .lrc file), the following will happen as intended:
Lyrics will show as embedded in the music file within MusicBee. (as opposed to stored in lyrics file)
The modification date of mp3 file will update.
However, despite things going like they are supposed to, when I close MusicBee and reopen it, the synchronized lyrics is just not there.
Unsynchronized lyrics works fine, by the way.