Bug with MX keys and Win 10
Whenever I mute speakers using the MX keyboard, the mute state becomes permanent. Neither one can use the keyboard to unmute nor can one use Windows tools, such as restarting the audio service in services.msc. The only thing that helps is rebooting the computer.

This is a very nasty bug, as this may cause leaving screensharing sessions to restart the machine. Please investigate and fix.

Thanks, Holger