Ads with sound play while Im trying to sleep

For the first few nights, I didnt have any issues with the app. I loved it. However, last night, one of the ads on the bottom of the screen started blasting sound, and kept doing that on repeat. I couldnt turn it off. It ruined my experience with the app. I am now afraid to sleep with it on because Ive been startled so many times as I was about to fall asleep.

shellicle about Sleepzy - Sleep Cycle Tracker, v1.3