"No value will be returned by reference" when calling Event Dispatcher with an Array

When creating an Event Dispatcher that sends an array, a blue Note shows up on the bottom of the Call node stating that "No value will be returned by reference". This is a similar issue to [Link Removed].

This issue was reproduced in 4.19.2 (CL-4033788), 4.20.1 (CL-4233996), and Main 4.21 (CL-4280116)

1. Open the UE4 Editor and create a blank project
2. Create an Actor Blueprint and open it
3. Add a new Event Dispatcher, add an Interger variable, and change its type to an Array
4. In the EventGraph drag off BeginPlay and call the Event Dispatcher
5. Drag off the Array variable and add a "Make Array" node
6. Compile the Blueprint

Results: The Note "No value will be returned by reference" appears

Expected: The Blueprint compiles without the Note.