Proper function of playlist not always existing

A 3.5.35 on Mac. I have an album with 2 discs: one disc is with tracks from baroque, one with tracks from renaissance. So I put the renaissance tracks in a renaissance playlist and the baroque tracks in a baroque playlist.
When I play the album in the baroque playlist with the shuffle function on, A chooses also tracks from the renaissance playlist.
The album is in both playlists shown in gray with the “Play” icon.
It seems, that A uses the shuffle function for the whole album instead of choosing only the tracks contained in the active playlist.