I have a DX8 and a pixhawk.
The DX8 is set to trigger channel 7 on a switch. When I look in MP at the radio configuration, I see the switch responding.
There is an RC Switch plugged into RC7 and it does not light up when the radio switch is thrown.
I’ve plugged it into channel 6 and it wakes up just fine when the throttle is raised, so that works.
This seems really odd.