AirPlay Cannot Play Audio on Multiple Speakers in tvOS 26

In tvOS 18, it was possible to select multiple AirPlay speakers (TV speakers + Sonos Move 2) and listen music in multi-room setup. 

Since updating to tvOS 26, only one speaker outputs media at a time.

• When I select from Apple TV the TV Speakers, I hear all music correctly.

• When I select from Apple TV the Sonos Move 2, I hear all music correctly.

• When I select both “TV Speakers” and “Sonos Move 2,” only the Sonos plays media audio — while system interface sounds (tvos clicks) play through TV speakers without music. 

Previously, Spotify worked with a multi-room setup (TV speakers + Sonos Move). After the update, this no longer works.

Each speaker works correctly on its own, but when selected together, only the Sonos outputs audio.

It’s super annoying, this update destroys my setup. Can you help me with this? I install tvOS 23.2 and still problem exists. 

Apple TV 4K Ethernet A2843