Export to Image does not always work if a custom data provider is used

I am unable to export an image from the map control that is off screen using a local map provider.  I would like to able to control the size and the zoom of the map image exported in order to make sure custom layers are included.

I have attached a project that has a form with two buttons and the offline map tiles.

1. Upon loading the form, a map control is added to the form.  The map control uses open street map as a provider.  A polygon drawn on a vector layer using WKT.  This is to demonstrate that the offline maps are being rendered.
2. The Online button instantiates a off screen map control. This map control uses open street map as a provider.  A polygon drawn on a vector layer using WKT.  The image is exported when the layer's data has complete.
3. The Offline button: instantiates a off screen map control. This map control uses map image tiles locally as a provider.  A polygon drawn on a vector layer using WKT.  The image is exported when the layer's data has complete.

When I attempt to export the image using map image tiles locally the map control does not behave as expected.

1. If I remove the setting of the map control's size (e.g. 640 x 480) an image is generated but the map is rendered in its default size (400 x 200)…  Anything outside bounds of the default size will not render an image.
2. If I change the zoom level from 17 to 15 the I am unable to export an image.

Any suggestions?

Thanks
Justin