Input Key Selector does not bind to any mouse input

I have a system where I can rebind input. This works great for the keys on my keyboard but when I use my mouse to re-bind input it doesn’t work. None of the mouse inputs seem to be able to be re-mapped. I have tried three mice, wired and wireless and still I cant seem to get the input key selector to re-bind to my mouse input.

Okay figured this one out. For some reason, if the mouse cursor is not over the key selector, then the mouse input will not be re-mapped. The mouse cursor must be over the key selector for the mouse input to be bound.