Persistent note on custom event when param is created from connecting array - "No value will be returned by reference"

If the user creates an array parameter on a custom event node by connecting a pin to it, a persistent node will appear on the node that cannot be cleared.

This only occurs if the param is created by connecting a pin to it. If the user creates it from the event's details, it does not occur.

1. Open any project in editor.
2. Open the level blueprint.
3. Create a custom event
4. Create a bool array variable.
5. Add a set node for your variable.
6. Connect the exec paths for the custom event and the set node.
7. From the set node, drag the array input onto the custom event, to create a new parameter.
8. Compile.

RESULT

A note appears on the custom event node that will not be cleared.