I have a map with several layers from one hosted Feature layer. In ArcGIS Online all of the layers display properly, but when I open the same map in Explorer or Collector, 2 of the 9 layers don't display at all, but they are listed in the legend. What is really strange is one of the layers is labeled by its attributes and the labels display, but not he point feature. I've deleted the online map and built a new one from scratch, but the same thing happens. I've overwritten the Feature layer, but that didn't help either. This is a map that we've been using for years and have never had this problem.