Trigger Glitch: When the user presses a key, only works after clicking on an object

I came to this tread because I saw the the keyboard trigger requesting I set an object to be clicked. After reading Becca's comment about the slide just having to be 'in-focus' and not 'clicked', it helped me to understand what was happening. 

I setup a test to play/pause the timeline by pressing P and it works without having to click anything. I feel updating the language used in storyline from 'clicked' to 'in-focus' could help other from thinking they've hit an issue.