Ok so we have the mapview.sketcheditor.startasync with a freehandpolygon in a loop and we can draw the polygon and geometry is returned, we can then keep drawing polygons one after the other with no problem. We then pinch to zoom the map and the first mapview.sketcheditor.startasync after that doesn't draw a freehand polygon but instead pans the map and returns a null geometry, after the pan we can then draw a polygon.
This feels like an Esri bug.
1. Has anyone else experienced this?
2. What did you do to get around it?