Adding songs to playlist when creating list on mma, all is looking good. When going back and adding more songs from library on mma to the same newly created playlist, all appears good but is not good and error only shows up when you select the playlist by using long press selection on android then pressing play arrow to start playing the playlist.

When the song starts playing change it to one of the last songs added to the playlist, you then see the error is only with the latest added songs in the playlist and the error is in showing the artist of the song it will show all the artists of the last songs added to the list as the artist for the song, and it does that for each of the last added songs, if you allow the song to play completely it is a 50% chance the artist will not be overwrote in the properties field for artist.
But if you stop the song and back out to the playlist selection area and reselect the playlist and send it to the player, the last songs are then correctly showing the artst of the song, depending on number of last songs added to list is how many times you need to do this restarting of the playlist to correct the error.

Yes it is reproducible at will.
And it only just started this error with the last update of mma,.