Why is my Galaxy S6 (Verizon) vibrating every 60 seconds?

[AC Question]

I have a Samsung Galaxy S6 and yesterday I updated the software to G920VVRU3BOG5. I keep my phone on vibrate, and this morning I noticed that it would vibrate and not display a notification. I tried to clear the phone's cache, rebooting it, turning it off and on again, but I am reluctant to factory reset the device. The phantom-notification every 60 seconds is an extremely annoying problem, and I am hooping that there is a fix for this. Is there?

Thanks