My escape key doesn't work
I have a Macbook Air with normal keys, no touch bar, and the escape key is there but it won't work. It doesn't work to escape full screen, to pause games, to do shortcuts like ⌥+⌘+esc for force quitting. There is one application and one application only where it functions normally and it is a completely random program that is irrelevant to anything Apple, so I'm not sure why it only works there. By the way, it doesn't matter whether or not this application is open. This has been happening for about a week, maybe less, maybe two, I kind of lose track of time. If anyone can help me with this I will be very grateful.
MacBook Air 13", macOS 10.13