so the input configuration window freezes on version 2.50.2.1 if the game loses focus while checking for user input.
it also doesn't register back shoulder buttons on the xbox 360 controller or dpad or joystick
on version 2.55_Alpha_20June_2017 it freezes either as soon as the input panel is shown or as soon as any buttons is clicked
I am on windows 7 and using a red rock candy xbox 360 controller via usb I hope this helps.
