Unable to trigger failsafe in quadcopters

ArduCopter Copter 4.4
1

I am setting up a quadcopter but I am unable to trigger failsafe when the radio is turned off.
In arduplane, the failsafe is triggered as soon as the plane is connected to battery or USB if the radio is off, but in quadcopter it does not.
Here is a short clip showing the difference between Arduplane and Quadcopter when connected with MP without radio turned ON.

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2

ArduPlane and ArduCopter do not have exactly the same actions in radio failsafe.

From the ArduCopter Wiki:

If the copter is disarmed, no failsafe will take place.

If the copter is armed but has landed, the copter will immediately disarm.

If the copter is armed in Stabilize or Acro modes, and the throttle input is at minimum, the copter will immediately disarm.

Otherwise, the copter will take the actions as configured in the parameters described below.

https://ardupilot.org/copter/docs/radio-failsafe.html#when-the-failsafe-will-trigger

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3

I figured out a workaround by arming the copter with USB hooked up and than turning off the radio, and it did trigger the failsafe.

I guess, I just like to positively confirm the action before sending off a four blade lawn mower in the sky.