I ran into a message form allowing to report the same name artists and have reported the case with bluesman Smokey Wilson and another artist by the same name being shown as one, and also the same case regarding of Bill Morrisey and Morrissey. No changes yet happen and no replay to my message, so I think it doesn't work. Strange that we have no replays from the Spotify team - the issue is an important one and should help to improve the app greatly, not to say to give fair and proper treatment to the artists. Let's hope for that we finally get some attention.
This is still an issue! You used to be able to report issues with metadata in the Spotify desktop app, no longer though. I often get music by a bad German rapper called Devo in my Release Radar (instead of the American band Devo), and I got a song by an American rapper TOKYO instead of the group that performed with Nina Hagen