I just noticed today that when I play content on all three soundtouch speakers I can not control the volume by using the remote controle that was provided with the ST 20 III. Only the speaker I am aming at will respond and change it's volume. I have 2 ST 20 III and one Soundtouch wireless link adapter which is connected to a solo 5 soundbar. When I aim at my " grouped speaker " and use the remote to change the imput it works all three speakers switch to bluetooth eg. When I aim at this grouped speaket only this speaker will in/decrease. ( bottom picture )
When I use Alexa to control the speakers ( using the US skill ) Alexa ask Bose to increase / decrease volume with ... % it works, Alexa changes the group volume.
When I bought my first set of ST 10 III I noticed that the remote did not function on the speaker that was not the leading speaker of the pair, after I returned the speaker to the retailer I found out that in playing all mode only the leading speaker could control the volume.
Offcourse I tested this also with the button on top of the speaker, the group volume does not change when using the remote or the button. Alexa does change the volume of all speakers.
Is this a bug in the system ?