Indeed I was able to observed the behavior you have described. In order to minimize memory consumption and improve performance of the control, the actual image data persistence is executed as late as possible (PreRender or Render) in control's lifecycle. However, in your scenario, as the control is not visible, those methods are not executed and the image data is not persisted.
In order to cover such scenarios, we have added a new property (PersistDataIfNotVisible
), which to force data persistence if control is not visible. Therefore please download the next internal build in which this property should be available and give it a try.
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items