Hello Diana,
Could you please let me know if you have set transparency for the LoadingPanel control? If yes please note that in this case it will not show in controls with set z-index as RadMenu. If this is the case please set z-index manually for the LoadingPanel and verify of this works for you.
Sincerely yours,
Maria Ilieva
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