Hi Brad Hickey,
if needed). In most cases IsSticky is not needed to be "true", so please remove it if you have it.
Another cause of troubles in the discussed demo is that the contents of the RadAjaxPanel is an absolutely positioned container, which does not expand the RadAjaxPanel vertically and its height is zero. This prevents the RadAjaxLoadingPanel from showing correctly. In this case one can set Height to the RadAjaxPanel. We have fixed these issues and you can take a look at the updated demo.
All the best,
the Telerik team