Server Version#: 1.18.5.2260
Player Version#: Any
For a long time, I’ve never been able to get lyrics for ANY song in my library. Then on a whim while trying to fix up missing song titles, etc I tried just refreshing all metadata at the music library level.
After it finished whatever scan it was doing, it went into a “Downloading” state, and then after that finished, nearly all my music had lyrics!! I was super happy.
Then I added one more album so had to kick off a scan of the library so it would be picked up…and then as it scanned the library it removed all the lyrics 
Seems like a bad bug. Has anyone else noticed this?