Thanks for getting in touch about this. This is a bit of a strange one. Let me touch base with the team and see what I can find out. Can you tell me if the album has been identified in Roon? If it isn’t you should see Unidentified near the album data just above the track listing. Thanks!
Turns out that what you’re seeing in intended behavior and not an anomaly, I was mistaken. Roon will display Work/Part on the album display but use the track name in the Now Playing window. This is because there could be more detail in the track information, this handling allows us to display as much metadata as possible.