I haven't geocached in months due to this. When using the compass page (all green) the yellow needle is frozen in a random position. The native iphone compass works great (and is calibrated). I'm using Version 6.10.1 and iOS 11.4.1 on an iphone X. If I use the map page, and the "pivot" feature (Or whatever it's called) the map pivots as I move the phone. Has anyone figured out a workaround?