Functions are called multiple times when given more than one reference

Functions are called multiple times when given more than one reference. The function is called a number of times equal to the number of references that it is given.

1. Download the attached project
2. Open the project
3. Play in Editor
4. Make sure that the viewport has focus
5. Press the '1' Key
6. Notice that Hello prints multiple times

Expected: The Function would only be called once
Result: The function is called a number of times equal to the number of references that it is given

Fix UE-51650

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