Copying a Blueprint with existing component causes hit events to be triggered in original BP also

If you have a Blueprint with a pre-existing component, then add that to a map, and copy it, OnHit events in the COPY will also trigger in the ORIGINAL.

According to the licensee, this happens with ACharacter, which has exisitng components or AActor with a component added in C++, I only repro'd and confirmed the ACharacter case (Repro steps and more explanation included)

1. Create Blueprint from Character class
2. Add OnHitComponent for the Capsule and wire up a Print String to display the Self variable
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3. Drop one of these in a map. Name it "ObjA"
4. Alt-drag to copy it. Name it "ObjB"
5. Run the player into each placed Blueprint

Result:
Hitting ObjA prints "ObjA"
Hitting ObjB prints "ObjB" AND "ObjA"

*If you set the Debug filter to ObjA and add a Breakpoint for the OnHit event, it'll trigger the break even when bumping into ObjB

*If you drag in a fresh Blueprint "ObjC" rather than copy, this problem doesn't occur.

Fix UE-51650

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