15 seconds later? That sounds more like your controller than the game. If that was the case you'd see countless reports about it. Though as always with intended functionality, to properly test things out you're better off resting any modifcations. You tried it locked at 30fps or letting the game limit the framerate? Not that I had any issues with a 360 controller at 60fps over 40 odd hours and certainly not that long a delay in between button press and action on screen.
15 seconds is my side but the other one is common (it was where I got the tip for compatibility and overlay), even with both wireless and wired. #2 is mostly fixed due to that..hasn't come back.
It is just annoying having to wiggle and jiggle..move back and forth so my character actually moves and not take swag baby steps lol
(also can you help me figure out a build and stuff? I already have pictures)