I am a little surprised that the listenbrainz api is rejecting the artist id here (if indeed that is what's happening). This is the canonical artist id from musicbrainz picard, so it's not really an "incorrect" id:
I'm not familiar with the listenbrainz api, but I would hope (perhaps naively) that it handles artist ids in the same form as given in picard.
@jonas The very first scrobble in the cache had the following artist id:
2ea8cbd8-f8d3-4d5e-ab62-f2f74a5b27db/529c0669-8994-4356-92f0-048fec6d8dd1
I'm guessing the slash (multiple artists?) is where things are getting tripped up.
{
"album": "Void Walker",
"albumartist": "GHOST DATA",
"artist": "GHOST DATA feat. AL!CE",
"grouping": "",
"length_nanosec": 248544000000,
"musicbrainz_album_artist_id": "2ea8cbd8-f8d3-4d5e-ab62-f2f74a5b27db",
"musicbrainz_album_id": "5bd19aec-9ad3-4c56-96b9-b5466a13b966",
"musicbrainz_artist_id": "2ea8cbd8-f8d3-4d5e-ab62-f2f74a5b27db/529c0669-8994-4356-92f0-048fec6d8dd1",
"musicbrainz_disc_id": "",
"musicbrainz_original_album_id": "",
"musicbrainz_original_artist_id": "",
"musicbrainz_recording_id": "1ef0fcfe-7874-494a-b543-f22d319f5548",
"musicbrainz_release_group_id": "a4c48116-924a-49b3-ac8f-68dde72849aa",
"musicbrainz_track_id": "5cd38819-afd5-426e-80ff-e39562fbf946",
"musicbrainz_work_id": "",
"timestamp": 1681536583,
"title": "Full Bodied",
"track": 6
},
@jonas the scrobbles in that file look correct, yes. As in, they look like the scrobbles I would have expected to be submitted but weren't.
Scrobbles submit correctly again after deleting that file.
I'm seeing the following logs, all for the same song:
12:52:42.558 ERROR OVHLyricsProvider:110 OVHLyrics: "Error transferring https://api.lyrics.ovh/v1/GHOST DATA/Femme Fatale - server replied: Gateway Time-out (499)"
12:52:42.558 ERROR OVHLyricsProvider:110 OVHLyrics: "Failed to parse json data: illegal value"
12:52:56.569 ERROR ListenBrainzScrobbler:728 ListenBrainz: "artist_mbids MBID format invalid. (400)"
12:53:26.554 ERROR ListenBrainzScrobbler:728 ListenBrainz: "artist_mbids MBID format invalid. (400)"
12:53:56.555 ERROR ListenBrainzScrobbler:728 ListenBrainz: "artist_mbids MBID format invalid. (400)"
12:54:26.556 ERROR ListenBrainzScrobbler:728 ListenBrainz: "artist_mbids MBID format invalid. (400)"
12:54:56.557 ERROR ListenBrainzScrobbler:728 ListenBrainz: "artist_mbids MBID format invalid. (400)"
12:55:26.554 ERROR ListenBrainzScrobbler:728 ListenBrainz: "artist_mbids MBID format invalid. (400)"
12:55:56.537 ERROR ListenBrainzScrobbler:728 ListenBrainz: "artist_mbids MBID format invalid. (400)"
12:56:26.498 ERROR ListenBrainzScrobbler:728 ListenBrainz: "Server stopped accepting new streams before this stream was established (205)"
12:56:26.498 WARN unknown stream 53 finished with error: "Server stopped accepting new streams before this stream was established"
This is a song that previously submitted to listenbrainz fine.
If it helps, here's sql output of the tags for this song:
> select url, acoustid_id TEXT, acoustid_fingerprint TEXT, musicbrainz_album_artist_id TEXT, musicbrainz_artist_id TEXT, musicbrainz_original_artist_id TEXT, musicbrainz_album_id TEXT, musicbrainz_original_album_id TEXT, musicbrainz_recording_id TEXT, musicbrainz_track_id TEXT, musicbrainz_disc_id TEXT, musicbrainz_release_group_id TEXT, musicbrainz_work_id TEXT from songs WHERE url LIKE "%Femme%";
file:///Users/tybug/Desktop/Liam/Music/GHOST%20DATA/Void%20Walker/05.%20Femme%20Fatale.mp3|63a921d1-9747-4cb2-8463-3533e3953359||2ea8cbd8-f8d3-4d5e-ab62-f2f74a5b27db|2ea8cbd8-f8d3-4d5e-ab62-f2f74a5b27db||5bd19aec-9ad3-4c56-96b9-b5466a13b966||53ada774-a765-4a02-9c1f-a53793264df0|14b5cd60-97d1-438a-9549-c6aca612e72c||a4c48116-924a-49b3-ac8f-68dde72849aa|
The mp3 in question: https://drive.google.com/file/d/1SCmTzsvHN8acEd5PZ32Mfkv804dpRP94/view.
Similar behavior for all other songs.
Hmm. After a few hours of continuous usage, strawberry seems to stop submitting "listen completed" events to musicbrainz. "now playing" still submits correctly, but musicbrainz never sees the current listen get completed. All listens before this point worked correctly, both with the now playing and completed events. I don't know at exactly what point this stopped working - the only thing I remember doing out of the ordinary recently is changing to a new playlist and changing the order of playing songs with the "queue to play next" feature.
I haven't observed this behavior before (previously using 1.0.15). This is a pretty weird bug so I'm not 100% convinced it's strawberry's fault, but it seems unlikely it's something wrong with listenbrainz. Let me know if there's any debug information I can provide that would help with this.
Thanks for the release! Everything looks to be working correctly after a full collection rescan.
@jonas No worries; thanks for checking in.
@jonas Awesome. That timeline is fine with me. I've sent $100 to the paypal linked on https://strawberrymusicplayer.org/#sponsorus.
@jonas I'd be happy to pay you $100 in exchange for an implementation of this - is that something you have any interest in?
Would pay you through paypal ahead of time. No rush on a timeframe except in the vague near future (~1 month) - I've used strawberry without it for years, I can wait a little longer 
To be clear, I'm just looking for strawberry to send already existing musicbrainz id tags in listenbrainz scrobble submissions, not to calculate acoustic id fingerprints on the fly anything. I think this github comment has the full list of musicbrainz specific tags which would be of use in track matching.
Would love for this to be implemented. I tag all of my music with MusicBrainz Picard, which adds these musicbrainz-specific tags.
A lot of my tracks go unmatched by listenbrainz since my artists are usually named the romanized of their canonical japanese names, which I suspect listenbrainz doesn't know what to do with (one could argue they should improve their automatic detection, but perhaps they're being conservative to avoid false matches).
Tracks being unmatched means listenbrainz can't do cool things with a lot of my listens in their upcoming year in music (aka spotify wrapped), which makes me sad.