I have the same issue with my S6, but also was having issues where my phone would simply not charge through the USB port. I took the phone to a Samsung 'flagship' store in NYC which had a repair shop in it as well. After looking at the charging port with a magnifying glass the woman at the counter told me that my port was bad. She said this was most likely caused by using a cheap micro USB cable. I left the phone there for a few hours, they ended up replacing the small board that the usb port is connected to, the battery, and the screen. At this point I decided to buy the wireless charging mat to be safe. (its actually a nice $30 investment) Problem however is that there are times when I need to use a micro USB cable to charge the device while I'm out or away from home etc. After about a month with only 2-3 regular charges through the charging port, all the above issues began to happen again. As of now my ability to charge via USB is hit or miss, and the VR setup screen usually appears after I've attempted to charge the phone through my usb cable.
I'd love to see something posted about this on Drippler if others are experiencing the same thing.