LoadingPanel persists when it shouldn't

[Scott]

I have a RadPanelBar inside of a RadAjaxPanel. When an item is clicked on the RadPanelBar, I dynamically load a user control that uses a ModalPopupExtender. After a button is clicked on the user control and it causes a postback, everything works as intended and I can click another item on the RadPanelBar and everything works. When the user control is closed by the CancelControlID property of the ModalPopupExtender however, it doesn't cause a postback and the next time I click an item on the RadPanelBar, the RadAjaxLoadingPanel persists.

 

What the page looks like on load before any clicks: http://i.imgur.com/drnCcNO.png

What the rad panel bar looks after click on an item: http://i.imgur.com/czikveQ.png

Modal Control is loaded: http://i.imgur.com/rDT07Yw.png

After Modal control is closed without causing a postback, when clicking on an item in RadPanelBar again, it seems to be even more dim: http://imgur.com/YZNmRpM

 Now when user control is loaded again, the loading panel persists: http://i.imgur.com/TAXnRH4.png

[Maria Ilieva]

Hello Scott,

Based on the provided description it would be rather difficult to directly determine what exactly is causing the issue on your end. Therefore I would kindly ask you to share your page markup as well as related code behind to all the application pages.
Thus we will be able to revise your code locally and advise you further.

Regards,
Maria Ilieva
Telerik