I went to settings/input and chose Mine.map, selected "yaw" and "change". Moved the pedals and it switched to "mouse". I figured that it may be that so I tried the game and the yaw control was indeed in the mouse. I'd appreciate your help.
It happens if you move the mouse, even with a micro-mouvement after clicking on the button "change".
Try to place the cursor on the button "change", then stop holding the mouse and just click with one finger without moving the mouse.
.... then you can move the pedal to select it....
Once you click on "change", the first axis you move (on your control device.. or with the mouse), will be selected