On a Cardo two bluetooth channels can be used simultaneous.
Besides the intercom there are two other channels you can use for other bluetooth devices. This makes a total of 3 bluetooth connections while only 2 can be used simultaneous.
Perhaps this a cause op the problem.

I'm pretty conviced MRA is not the problem. Because MRA has not to do with bluetooth connections. Android or IOS manages this.

@Con-Hennekens Correct. I above all like the wonderwheel usage to zoom in/out. This requires no extra buttons at the handle bars, just the BT module which makes it even cheaper.

@Corné-Voogt said in BarButtons:

@Jörgen item 1 is a known issue. Item 2 is a bug MRA are working on is what I heard.
New firmware for BB when available can be found here https://jaxeadv.com/barbuttons/using-the-barbuttons/
Updates are announced on facebook: JaxeADV.
Update via Wifi eg hotspot on your phone.

Thank you!