Hi all, during my last two runs, WITH my iPhone, I noticed that the pace of my run seems slower than it should be and I've had to go farther than normal to achieve the same distance. When looking at the map in the Activity app. I've noticed that there were times that the route that I was on shows gray dots as opposed to green, yellow, or red. What do these gray dots mean? Most of my runs before this on the new operating systems do not have these gray dots. Do I have an issue here?