Hi.  I have a Spektrum radio DX8 with AR8000 receiver and I've configured it to send 925us throttle signal during radio failure. Normal for my radio (throttle off) is about 1126.  In the mission planner I turned tested and the receiver does send 925us on the throttle when I shut the radio off.  As I understand it, the threshold is 975us.  However, my APM2 shuts down my props in the even of a radio failure.

I think I have it configured in the mission planner to go to an altitude of 10m, then RTL.  Landing is turned on.  The way I tested was to:

1) Turn on my receiver and Turn on my hexcopter

2) Get GPS lock

3) Fly it to a new location and land, but leave the props running

4) Turn off my receiver.

Expected behavior -- for my hexcopter to takeoff and land back at the starting location

Actual behavior - motor shutdown.

Any ideas?  I can attach logs, if they are needed, but right now I can't get to them as we have a power outage. 

Thank you.