Some receivers gets their fail-safe positions from the stick position when they are bound to the TX.
You should always rebind once you have got all your programming done, like reverse and trim.
Some prefer the failsafe to be
motor off,
slightly rudder to get the plane to circle and not to fly straight away,
elevator up to get the plane to stall and loose altitude.
Those settings are good only for "self flying" models like trainers.