The same effect happens to me! However, I noticed that if I disconnect my E-Coder2, the TCI icon disappears, and the option to select a microphone input appears: Microphone 1, Mic 2, Mic PC.
Another thing I discovered is that this issue only occurs with RX 1! If I switch to RX2, there is an option to choose between MIC 1, 2, 3, and E-Coder 2.
In my opinion, the problem lies with E-Coder 2 because I observe that it never gets detected when EESDR3 is turned on. I have to unplug the USB connector and plug it in again for E-Coder 2 to be recognized and used.
The solution provided above by Dk8JV works.
Thank you.
73's de LZ2XA /VAL