Throttle in FBWB, Auto, and RTL modes

Hi all,
I’m stumped, and wonder if I might be able to get some help on a basic issue.
I attached to associated parameter file for reference.

I have a GoDiscover flying with the newest version of Mission Planner and firmware.
Everything works fine in manual and FBWA modes,
but the throttle won’t work on the ground in other modes such as FBWB, Auto, and RTL.

I spent quite of bit of time searching the web for explanations of what I’m experiencing, and I found this:
plane.ardupilot.com/wiki/apmplan … anual_mode

So my question is this, with the default parameter settings (attached), should the throttle work on the ground in FBWB mode?

Thanks

@cabouman,
Where is the attached parameter file?
Regards,
TCIII GM

Sorry, here is the zipped parameter file.

OK, so the answer for anyone new who is ground testing their aircraft,
the throttle stays off in FBWB, Auto, and RTL modes on the ground
even when the motor is armed.

In the air, the throttle will work in these modes as described in:
plane.ardupilot.com/wiki/apmplan … anual_mode

Thanks.