Selfie sticks should be outlawed! (I work in a tourist building and have almost been swatted by a few)
SmartThings has the option to turn things on and off based on location and time and other criteria (similar to IFTT). My guess is this may have something to do with it. Especially since you call it a new app. Have you tried removing it to see what kind of results happen? (and, if it's one of those pesky factory installed apps, have you tried disabling?)
That sounds like it'd be a pain to use any sort of Bluetooth functionality after the update. I agree with smplyunprdctble's suggestion of removing/disabling the app to see if that does the trick. If that doesn't work, try running your S7 in Safe Mode. If running your S7 in Safe Mode fixes the Bluetooth issue, an app is the likely cause for this happening.