This is happening because the property 
FText DelegatePropertyDisplayName;
on UK2Node_ComponentBoundEvent is serialized, so it does not get properly updated. 

Steps to Reproduce
  1. Create a native class (FooActor) that override Actor
  2. Add a delegate UPROPERTY with a display name set
  3. Override this class in BP and add a call to this delegate
  4. Close the editor, and change the display name of the delegate property
  5. Add a property redirector in the  [CoreRedirects]section of DefaultEngine.ini
  6. Restart the editor, notice that the display name of the event is not updated 

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ComponentUE - Gameplay - Blueprint
Affects Versions4.244.254.26
Target Fix5.1
Fix Commit21907049
Main Commit21911232
Release Commit21907049
CreatedMar 19, 2020
ResolvedSep 8, 2022
UpdatedOct 11, 2022