Hi,
I've problem with TabControl inside RadBusyIndicator. Lower navigation arrow is disabled when there is no space for all TabItem headers. It's enabled only when I'm click on random header. If I remove TabControl from indicator, arrow is enabled and everything works fine. I attached sample project with this problem (change jpg extension to zip).
OS: Windows 10
Silverlight: 5
Telerik product version: 2019.1.128.1050