My first test on a FD not acting right is to shift to the larger ring then relax. I then pull the cable from the frame and see if it still has a tiny bit of travel before it hits the limit stop.

If it's correctly set up (by my standards) there should be a bit of over-travel that this will detect.

Unfortunately too many people use the upper limit stop, who's sole purpose is to prevent overshifting and dumping the chain, as a trim adjustment. To properly set up the FD, back the limit off and out of the way, and adjust the trim in high by way of adjusting the cable length (tension). You want it adjusted so it shifts crisply, and the trim ends up so the outer plate barely clears the chain when it's coming from the outermost rear sprocket. If it's adjusted perfectly it'll shift crisply and sometimes dump the chain over the side. You'll now make a final adjustment of the limit screw to prevent dumping the chain, but not so far that it's affecting the trim.