I have a Spektrum dx6i and I was able to configure it for failsafe with Mission Planner (signal lost).
It works fine with Mission Planner, when I power off my TX, failsafe is triggered and RTL occurs. I did test on flight and works great.
But when I am using Droidplanner on my Nexus 7 2, this failsafe does not more work. When I power off my TX, Droidplanner disarms APM, instead of failsafe.
Is any specific way how to configure failsafe for Droidplanner?