Love it except for one recent issue

I really love this app but within the last 3 days the fan has been turning itself off in the middle of the night. I usually set the timer so the fan will run all or most of the night but recently it has turned off only 1-3 hours into its cycle. Last night it turned off 5 minutes after I set it. When I wake up an reset it for 8 hours sometimes it goes off again later. I dont know what the issue is but please fix it because I do love this app!

mcstone12 about Sleep Fan