Safari running Monterey will not play Airplay audio
I just got a MacBook Pro 2021. If I play SiriusXM on Safari it will play fine on the internal speakers, but if I try to move it to my external Airplay speakers it will play for about 20 seconds and then no sound at all, even if I change back to the internal speakers. If I reload the web page, it will play on the internal speakers again, but shuts down if I try to Airplay. So then I loaded Google Chrome and I can play SiriusXM via Airplay from there. It also works fine from Safari on my 2016 MacBook Pro with the exact same OS and version of Safari.
MacBook Pro (2020 and later)