Personall I've enabled "Use mouse pit stop" in settings -> ac -> misc and "use pitstop menu for mouse" in settings -> ac -> system, but this will disable the pit menu entirely, even in setup screen.
I'm still using an old app for pit stops.
But occasionally it still pops up tho. And you cant make any changes to track files to avoid it. Maybe Santa Monica Mountains isnt made properly - I dont have it installed - and misses "KEY=PITS" in surface.ini. Dont know, just a wild guess, and right now I'm not at my gaming rig to install SMM and check it.
And your so called "pit screen" always (!) appears at my system whenever I start AC. So if this happens on your side randomly, you've made changes somewhere causing this.