Some keys not registering

I am using senocular’s custom Key class to detect keypresses, and for some reason it is not detecting certain keys, such as the “A” key. Has anybody else had problems with this and would you maybe know what’s going on? I am using it for a game, and I can get the player to move using the arrow keys, but when I switch to a WASD config, the “A” key does not register. Thanks in advance.