Yes, if I grip the gun and bring it back as if under recoil, the base of my left thumb contacts the slide stop. Is there a smaller slide stop available for the 4006? It's a nice big stop, I'm sure it works great for some, but I do not use it to drop the slide on a new magazine so it's unnecessarily big for me.

I will fire several partially loaded magazines one handed next range trip to verify it's shooter induced.