I wish to clarify your bug report:
-Did you mean there's gamepad input even when there are no gamepads connected? If this is the case, what is the input? (Is the camera rotating, perhaps?)
-Can you define what's flickering whenever you're in the Settings menu? Is it perhaps the texts? Or the dimmed background? And where are you whenever you encounter this? From the main menu, Glitch City, Prison Office, Gallery, or all of them?
the gamepad inputs problem could not be replicated and appears to have been resolved. the flickering of the options screen used to happen only while in game (ie. the prison, glitch city, and gallery) on version 6.3.2. now it happens on the options screen attached to the main menu in version 6.5.1. the flickering is not captured on screen recordings and is not present when not in full screen.
I'm terribly sorry, but after several tests, I can't replicate the problem. (I've tried it on multiple scenarios, such as different monitor hertz, vertical monitor, fullscreen mode, window mode, different locations in-game as well, and even changing of quality)
Because of this, I'm not able to make any changes to this problem.
I'll look into it sometime in the future if I manage to find a way.
Again, I'm sorry.