Hi @jamie,
A quick experiment indicates @BlackJack 's recollection is correct, though it would be nice to have confirmation that this is what was intended by the Roon developers.
In any case, I’ve submitted a feature request that Roon lyrics be overriden with user-supplied lyrics regardless of type (Override Roon-supplied lyrics with user-supplied lyrics regardless of type)
I don’t supply lyrics for my files unless there is a good reason for it. I assume other users do the same and I would be grateful if Roon would respect our efforts.