I recently got acquainted with this great piece of software, starting out with version 2.39. Just noticed after switching to 2.40 however, as the title suggests, every time I use the Actions menu (change cover art, change case, add extended tags, etc.), the lyrics (UNSYNCEDLYRICS) portion gets truncated to 10 characters! I noticed that this only happened to my m4a files, while flacs and mp3's done the same way still have all the lyrics intact after applying Actions.
I hope this gets resolved soon.