New dos2 stereo deferent firmwares

[struts]

Same problem here.. I have updated my speakers at the same time to DOS2, but still one speakers is on 2.8.1 and the other on 2.8.3.

Tried to update, but system is up to date according to devialet app

Are they from different vintages (are the first four characters in the serial numbers different)?  If so that might be the explanation, different hardware versions require different firmware versions..