Major issues with Yamaha Musiccast

[Hintermann]

Update: I discovered that having uninterrupted power supply (UPS) to the Musiccast 20 speakers alone was not enough. When the power fails, the Yamaha Receiver goes from standby to power-off for 12 seconds while the generator kicks in. In that time, the Musiccast link gets broken.

I am now getting a UPS device connected to the receiver as well and see how it goes. If even that fails to solve the issue, I'll have to get cabled surround speakers.