I am using a harmony ultimate remote to control volume on a paired set of play 1 speakers. The speakers are in a sonos group with a connect. The connect is set to fixed volume out. When I attempt to decrease speaker volume to zero with the ultimate remote, it will only decrease down to around 10%, and then bounces back up to around 20%. Controlling the volume with the sonos app works correctly, I can decrease the volume down to zero with no problem.