Since the beginning of this month, there is a Windows version of Pano-Scrobbler, which I use on Android for all other apps except plexamp. It does work on android if you turn off scrobbling via Plex, but not on Windows (yet). Would love to see it working someday.
The plugin will help in making sure now scobbeling works as intended and not how it’s implemented (absent) in plexamp. Also plex is recognized by Pano Scrobbler on Windows, so that app is sending out metadata correctly, and as said would be nice if plexamp does the same thing.
You’ll find the project here: GitHub - kawaiiDango/pano-scrobbler: Feature packed cross-platform music tracker for Last.fm, ListenBrainz, Libre.fm, Pleroma and other compatible services
PS: I’m not the creator,
just a fan.