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Expanding or Collapsing Groups While New Items are Added Cause the RadTimeline to Display No Items


Product Version 2019.1.220
Product RadTimeline for WPF


Expanding or collapsing groups, while new items are being added, can cause the RadTimeline control to display no items at all.


Disable the collapse/expand animations. You can do this via an implicit style that targets the TimelineItemGroupControl, and set the AnimationManager.AnimationSelector attached property to null.

    <Style TargetType="telerik:TimelineItemGroupControl"> 
        <Setter Property="telerik:AnimationManager.AnimationSelector" Value="{x:Null}" /> 

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