This one gets me all the time - if the system thinks the "wheel" is still moving, it doesn't update the value. So I am always having my alarms go off at the wrong time for the same reason - I set them in a hurry and click Done while the "wheel" is still animating but my selected time is in view, and the time I wanted doesn't register.

I'm not sure why it doesn't just set the time to the number that is mostly in the selection box and is being "snapped" to, instead of waiting for the animation to stop