Omni plus configuration does not produce servo signals

Hi All, sorry I try to post in the general Arduroverchannel what I asked alreadyin the Arduboat subsection:

Hi, I have a Pixhawk 2.4.8 with Ardurover 3.5.2 on it.
In the and I’ll want to use as a ROS node for a self-driving vehicle, but want to use some manual mode in the beginning, and doing some waypoint navigation.

I’m using Mission Planner, and I’m using a joystick trough telemetry radio, not the radio controller.
If I set:
FRAME_TYPE: 0
SERVO1_FUNCTION: 26
SERVO3_FUNCTION: 70
I can see the servo signals being produced and the engines turning.

But if I try the Omniplus configuration:
FRAME_TYPE: 3
SERVO1_FUNCTION: 33
SERVO2_FUNCTION: 34
SERVO3_FUNCTION: 35
SERVO4_FUNCTION: 36

I can see from Mission planner that the signals for motor1, motor2, motor3, and motor4 are not even generated, and the engines are not turning indeed.
But if I do the motor test instead they still turn, all of them in the right sentence.
I guess it may be something to do with the Joystick configuration?
Just a guess.
Can someone help me?
Thanks

are you armed? Dataflash log will help us diagnose.