Default Bluetooth sound muted

when my phone connect to my headset (sena smh-10r, motorcycle communicator), sometimes it's ok and sometimes the sound is muted, and i have to manually raise the sound level. Annoying when i'm all geared up or i already leaved.

I would say it's 50-50 chances and i can't replicate the outcome.

I tried with smart actions, i created a rule for when i connect to this headset, that sound is at max, but that's for the sound of the device, not the BT sound.

Any ideas ?

I hoped 4.4 would solve my issue but it's still a couple months to go.