You have to go to the “Falcon BMS.cfg” file. (//Falcon BMS 4.37/User/Config/)
Edit this file with Notepad++
set g_bHotasDgftSelfCancel from “0” to “1” and save the file.
Now the toggle will work when you only asign the "ON and “WARN/REST” switch positions.
That’s it. It took me also a while to get this solution from somebody else.
But it just " RTFM" if you know what I mean.