Airplay audio without apps interrupting
I’m streaming music to 3 audio devices using airplay, all good. I then browse twitter or Facebook and the audio from every bloody video is sent to my stereo and HomePods, replacing the music I WAS listening to! Basically when I use airplay, my phone is unusable if I want to continue to listen to music. How do I set apps to NOT play audio over AirPlay? And just play their audio on my iPhone ????