Mute output, headphones still on

For scenario that you need beatbuddy to act as a metronome that the main output is muted but the headphones are not. I can just disconnect the beat buddy from the chain, but I have to reconnect it again if I want activate the beats. The two inputs are currently use to combine vox and guitar in my rig.

Please let me know if there is a work around or it can be a firmware improvement.