Alarm fails about 40% of the time

I dont know what happened with this app, but in the past few months the alarm stopped sounding. I will wake up on my own and find it still recording my sleep. The screen evens displays the time the alarm was supposed to sound. But alas it does nothing. So I have to get rid of it. Today was the last straw.

Superjac about Sleeptracker® 24/7, v10.2