Telemetry Radio RSSI Not Working

I have a pixhawk 2.1 cube connected to a SiK telemetry radio and I noticed the RSSI reading is flat lined and appears to not be real.

Does anyone know if that is expected or if this is a bug?

Two things to test: Really shield one of the radios as good as you can so we’re sure that it should move around. And second: Run listener radio_status on the shell in QGC and see if the values there look different.