Mileage tracking inaccurate after iOS 11 update – Ride App—automatic ride mapper Review

I’m a daily bike commuter. I’ve used this app for almost a year and loved the way it tracked all my rides... until iOS 11 update and now it shorts my rides by up to a mile each trip. I’ve sent examples to the developer, but still broken. Please fix.
Review by Pdx.weedy on Ride App—automatic ride mapper.