Servo9_Function Mapping

I was using servo10 and servo11 , mapped to RCIN8 and RCIN9 1 year before and all was working fine. Today, I upgraded to latest v.4.0.7 (copter) and this mapping is not working. Please refer to below video and help me as I am spending some time in troubleshooting this simple configuration. I mapped RCIN9 (Radio 9) to SERVO9_FUNCTION with 59 but still the same. Output rail in pixhawk is getting proper current. Can anyone help please?.

It probably needs a reboot after you set the parameter. Did you try that?