Thanks for contacting us and for your questions.
In general, when adding custom group picker items you take care whether they are going to be "grayed out" or not by providing a custom GroupPickerItemTemplateSelector
. Also, you should handle the GroupPickerItemTap
event and bring into view the corresponding group item according to the group picker selection.
My suggestion for you is to take a look at our Demos solution, particularly at the JumpList's PhoneBook example. We have a source code available for your reference, that implements exactly the same scenario.
I hope this helps.
Let me know if you need further assistance here.
All the best,
the Telerik team
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