Gamepad is already set up, it’s some remnant code that’s not connected, because it can be used to make fallout-4 style functionality where you always have 4 replies, and you select one with gamepad face buttons. But scrolling through replies with the D-pad works.
I’m not sure what’s causing issues in your project, can you upload it to google drive and send it to me? Or if for some reason you don’t want to share your project, simply reproduce the problem in a clean project and send that instead. My email is on my marketplace seller’s page (don’t want to re-post it too often, afraid spambots might find it). Just send it to me and I’ll have a quick look.