Pixhawk 6C - servo on AUX1/AUX 2 passthrough problem

Hi,

I have:
HW arch: PX4_FMU_V6C
HW type: V6C000001
PX4 version: Release 1.15.0 (17760511)
Airframe Hexarotor X
Receiver R8EF Radiolink in SBUS Mode.
QGC version 4.4.2

I am trying to run servo off AUX1 and AUX2 outputs on the Pixhawk.
When I test AUX by moving the sliders in Actuator testing everything is OK. But after mapping the receiver channels to AUX1/AUX2 Passthrough RC channel has no reaction from transmitter. Regardless of the drone’s arming.

Any ideas?

Best regards

Grzegorz
1