Something appears to be wrong with how my Navio 2 is receiving the SBUS signal from receiver. When I go to radio calibration in ground control the channel monitor dots are all over the place and not moving in correspondence with my stick inputs. I am running servo cable from SBUS port (connected in the right direction) on the receiver to the PPM-SB port on servo rail next to channel 1 with bottom pin being ground. Radio is SBUS paired indicated by purple light on receiver and signal bars from transmitter. Channel monitor does move with stick inputs but in extremely erratic fashion.
FC: Navio 2 w/ RPI3 b+ w/ ADP v 3.5
GC: QGroundControl v.3.32
Transmitter: Radio Link AT9S
Receiver: Radiolink R9DS