So I've noticed if I don't pay enough attention and let the timer get below 30 seconds, the "Yes" button no longer works, no matter how many times I click it.
This is especially frustrating after waiting in a queue of 1200+ only to be kicked out near the end even though I'm there actively pressing the button. 
I know it may be as easy as "Don't let it drop below 30" but when I'm sitting in queue for over half an hour, I tend to not return until I hear the alert buzzer.
Sadly, if I get there too late (This being 30 seconds until the actual end of the timer) the button will just not work. Is anyone else having this problem? 