Meditation timer is suddenly silencing my background meditation music

I just noticed this morning that the meditation timer is now silencing background music. I had my system where I choose binaural beats meditation music through YouTube Music, and have that play in the background with the Finch timer. It worked for me. But now all of a sudden the Finch meditation timer is silencing it. Has anyone else had this problem all of a sudden? (My Pixel won't let me mix background audio like other phones apparently do.) I can use another app instead but then miss out on the extra rainbow stones.