Are you Sure you are on the right Firmware ? Because i think thats exactly whats Happens with the newer Firmware where Bluetooth Modifikation is blocked.
I tried to Programm it. Up to 99nm it saves the setting. If you try 100nm it switches Back to 85.
And even if you set to lets say 95nm you can't set the value in the assist settings, only up to 85 nm. So i think its a Glitch??
And the max Motor Power can't be set above 500w on my Ep8 with 4.1.8...