Thanks, Mark. I'm able to reproduce the issue in v100.1 and it looks like it did not render at all in v100.
Also, I find that when you opt-out advanced symbology, it renders just at it would in ArcGIS Pro. Do you mind trying the following workaround?
var mmpk = await MobileMapPackage.OpenAsync(path);
var map = mmpk.Maps.FirstOrDefault();
foreach(var layer in map.OperationalLayers.OfType<FeatureLayer>())
{
var table = (ArcGISFeatureTable)layer.FeatureTable;
table.UseAdvancedSymbology = false;
}
MyMapView.Map = map;
I have logged the issue so our team can investigate further.
Thanks.
Jennifer