I've been using the Nike+ app for running. I also run the Workout app so that my activity rings fill. The Nike app offers pace over the course of the run and is just more accurate than the native app. But...lately I've been having trouble starting it. I open the app on my watch and hit Start Run but it either takes forever or tells me I have to start it on my phone. My phone is in an arm band and nearly impossible to see in the sun. Is anyone else having issues with the Nike+ app on Apple Watch?