RSSI channel not being saved - old issue, still present

[nerdCopter]

https://github.com/emuflight/EmuFlight/issues/460

Describe the bug RSSI channel is not being saved (CLI and GUI - same thing). There is some workaround (rssi_adc should be off in a first place), but it is not a proper fix I think.

To Reproduce as in this video: https://www.youtube.com/watch?v=x-qdaVpmn5o

Expected behavior RSSI channel should be saved but it is not.

Additional context It is old issue with a known workaround but it should not behave like this anyways - I think.