Looks like there are a lot of artists with the same names in the world and they are usually mixed up. For example there is a reggae singer Pressure and a rapper Pressure (or maybe even a couple of them!), but Spotify thinks it is one artist.
I don't see any tools to mark their errors neither in mobile app, nor in desktop or web.
Could we as a users do something with it or is it just a poor service and no one cares?