RadDiagramShape has NULL content but has DataContext and ContentTemplate. In the ContentTemplate there are UIElements defined. Their automation peers are not added in the automation tree. This can be observed in UIVerify tools.
Hi, The fix for the issue will be available in next LIB version (2018.2.820). It will also be included in our official version – R3 2018, scheduled for the mid of September. Best regards, Ralitsa Kumanova