I have an offline Gdb that I use and I have noticed that random segments of my roadcenterlines will not display when I pan to them. However, when I pinch the device screen, those segments appear, but I pan away and come back and they are invisible again. I also noticed that labels for roads, again random, do not display. Nothing I do makes this change. My Spatial Reference is matching with the MapView and my FeatureLayer.
I have attached an image, if you can see it, where there is a broken segment on the road running NW from the intersection. Once again, if I pinch the screen it will appear. If I pan away and back to it, it disappears.