Screen goes dark whenever I start typing

I don't know if this is because of an update or because of my new phone, but my screen started going dark whenever I start typing with Microaoft Swiftkey. It didn't use to do this before and it's driving me NUTS. I CAN'T SEE A THING. If they're going to implement this feature, at least give the users an option to switch it off!!!! I've been having such a hard time typing and I'm this close to just uninstalling it altogether!!!!!