Need to press Space once then twice to trigger Key Down once

I have a method that is called when the user presses the space key.
I start the game, press space, and the method functions as intended!
I press space a second time and nothing.
I press space a third time and the method triggers again.
I press space a fourth time and nothing.
I press space a fifth time and the method triggers again.

No amount of time or movement changes the outcome. Works once then have to press twice every other time to get the method to trigger until the game is...

Need to press Space once then twice to trigger Key Down once