We purchased the receiver we used for development and testing in September 2022 from our Italian distributor Biz Model.
At this point the only possible solution would be to have your receiver or "at least" the graph of an oscilloscope connected to the serial signal pins to try to understand what is the behavior of your receivers.
But since you are NOT using a FlySky transmitter but a Radiomaster perhaps the quickest and cheapest solution for you is to buy one of the very inexpensive FrSky ACCST receivers which in addition to telemetry would allow you to be able to use Integration as well.
It would probably cost you less than it would cost you to ship your FlySky receiver to us in Italy.
For example, with a FrSky R-XSR receiver by uploading the firmware "ACCST_2.1.1_F.Port" you could use it in F.Port mode which is a faster protocol than the Smart.Port+S.Bus protocol and doesn't even need our adapter cable MSH51645.
(Smart.Port 56Kbps, S.Bus 100Kbps, F.Port 115.2Kbps)
@customercare im sending my configuration file and log from connecting and disconnecting SENS port after successful initialization. Red dot shows when i plug Y to SENS port and then brain frozes, green dot shows up when i plug off Y cable from SENS port
