Another issue I have: Why is zooming seems to be non-linear when I use ShapeFileLayer as source? On coarse zoom levels (1-5), i can zoom pretty quick, but on finer zoom levels (5+), it gets slower and slower to zoom to city/street level (I cannot really zoom in to street level).
This is not the case if I use OSM ImageryLayer. I see the world on zoom level 1. On zoom level 15 I'm already at street level.
When I use ShapeFileLayer (e.g. only the Isle of Man). I see the whole island on zoom level 1. On zoom level 80+ I'm still not that close to street level.