2020.12 update, playing mp3s with Sonos results in UPnP error 701. Breaking change?

Hey ladies and gentlemen!
I’ve just updated to 2020.12 and my IKEA Symfonisk (Sonos) is just not playing mp3s anymore… TTS is working though.


I’ve built the following button to abstract from my actual complex automations to test playing sounds and whenever I click the “Play Sound” button I get the following issue:

What change did break this? I was running on 0.116.2 before and everything worked flawlessly.

Bump… I can’t be the only one?

I have got the same error. Any solutions yet?

Same issue for me