App Exposé not working with trackpad gestures.

For a couple of months, I have been using a "three finger swipe down" gesture for activating the "App Exposé". Yesterday, it suddenly stopped working. When i do the gesture, it simply swipes to the next desktop.

I have tried fixing it over and over again, but it doesn't seem to be working.

Possibly check whether anything looks strange in System Settings => Keyboard => Shortcuts => Mission Control. (BTT triggers these)

If you haven't yet, try to restarty our system