SBUS Receiver Failsafe Behaviour

Hi Everyone,

I’m using a companion computer to control my drone via mavlink and I’d like the companion computer to handle the the RC failsafe situation.
I can tell if I’ve lost RC through the SYS_STATUS message, however, I’d like to be able to read the sbus receiver failsafe values as well. (I’ve set the failsafe values of each channel to particular RC channels) Currently, it looks ardupilot no longer reads in new receiver values after the RC connection is lost?
Is this the expected behaviour? If so, is there a way to read the receiver values after RC loss?

I’m using a CubeBlack running AC.4.0.3 and an FrSky RX4R reciever.