Great app - horrible update

Ive used this app for years and its been great. This recent update has been terrible. I use this on my dedicated iPhone 5 and since the update about 2-3 hours into sleeping the app does this click thing constantly. Ive tried to close the app and re-open but that doesnt work. I have to completely reboot my phone in order to reset the app. It then works again for a couple hours until it does it again. I find myself rebooting my phone usually twice every night, disrupting my peaceful sleep. This kinda defeats the purpose of the app. I hope the developer fixes this problem.

Stuartxoxo about Sleep Machine, v4.1