The last few days I have noticed that passing on hills (uphill mostly) can be incredibly hard. I have been doing 4.5 w/k and my avatar decides to sit in behind someone doing half of that. It happened a number of times. It totally destroys your forward progress. It was so bad a couple of times that I spent 4-5 seconds doing this. It lead to being dropped a couple times, and well as just being frustrating. Still love the app and use it all the time just want it to be the best it can be. Thanks!