When I try to load an polygon in FNC maps which has some blank spaces inside the polygon, it does not draw correctly.
I have added a screenshot of how the polygon looks in web viewer. And a geojson of the polygonComplexPolygon.txt (3.4 KB)
Unfortunately it's currently not supported to display complex polygons with multiple paths at this time.
However this is a good suggestion and we'll investigate if this feature can be added in a future version of TMS FNC Maps.