Volume does not work in the new multiroom interface

In the new version 2.882 (24-04-2021)
Volume does not work in the new multiroom interface
Log

RPI 2 / Allo BOSS
RPI3 / HifiBerry DAC2 HD

Details please. How does it not work? What were you expecting?

Yes, please excuse me, I could really have written a little more.
It’s not that important to me personally, I don’t usually use this feature. I just wanted to report this.

When I change the volume in the multiroom interface, the little button is moved, but the volume remains physically unchanged. So I don’t hear a difference, the music doesn’t get louder or quieter.
The volume remains unchanged in the normal playing interface.

In the log file you can see: (I don’t know if it has anything to do with it …)

Blockquote
Apr 26 20:16:16 volumio-hb-dac2hd-01 volumio[1044]: info: Setting Remote Device Volume: http://192.168.178.112
Apr 26 20:16:16 volumio-hb-dac2hd-01 volumio[1044]: error: Cannot set Remote Device Volume
Apr 26 20:16:16 volumio-hb-dac2hd-01 volumio[1044]: info: CoreCommandRouter::executeOnPlugin: volumiodiscovery , setRemoteDeviceVolume

Greetings
rost21A