Fwiw, I haven’t had this issue with my TX16S. I have a few different models of AFHDS2A receivers. I believe my binding procedure is to turn on the transmitter, put it in bond mode, put the bind plug on the receiver, plug that in, confirm binding, disconnect bind plug, then unplug the receiver and plug back in to confirm. I’m on the latest version of EdgeTX. Not sure if this helps.