I’ve raised before on the support site but trying to see if other have the same issue and if anyone has resolved.
I have Alexa Speakers (many and different types - all Amazon products) and use the defined group and everywhere multi rooms function to play music / audio around the house. This works fine with with Planet Radio (Free Service), Amazon Music (Prime only), Spotify (No paid service) and I tried all the suggest of re-setting Deezer and multiroom etc. (I’ve even tried take offline older device leaving just two more up to date devices)
It used to work with Deezer no issue until ~October 2021. Not sure exactly when it stop but now on any device when using the play music "everywhere" or play music "downstairs" (Deezer set to default music app) the display devices show the track information but no sound is played on any device. If I ask to play music on a single device it works no issue.
This is really irritating and so far no idea if this is single user issue or a wider problem. I can see on here others having issue cause by certification around the same time but that appears to have stop Deezer working on single devices.