`TreeView->ClearSelection()` gets called before the text is set/committed. `FBlueprintDelegateActionDetails::GetDelegateProperty` which calls `SMyBlueprint::SelectionAsDelegate` requires the TreeView to have a selection set, otherwise it fails.

Steps to Reproduce
  1. Create a new Actor BP
  2. Within the Actor BP, create a new event delegate and select it
  3. Inside the details panel of the delegate, type in a text within the `tooltip` field
  4. While the text edit field still has focus, left-click on the graph view
  5. Text reverts back to what it had before

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There's no existing public thread on this issue, so head over toAnswerHub just mention UE-67240 in the post.

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CreatedDec 6, 2018
UpdatedDec 6, 2018