Refreshing node does not resolve error and causes tooltip to display another line with same message with each refresh.

Clicking the compile button in the Blueprint editor resolves the error.

Repro:

1. Create a Third Person Blueprint project with Starter Content
2. Open the ThirdPersonCharacter blueprint in the bp editor.
3. Add an Event on Landed node and split the Hit pin
4. Click the Override buttton in the Functions section of the My Blueprint panel.
5. Select On Walking Off Ledge.
6. Hover the mouse over the error on the Event On Land node an observe it.
7. Right click on the node with the message and refresh it.
8. Hover the mouse over the error on the Event On Land node an observe it.

Result:
Refreshing the node like the error message in the tooltip suggests does not resolve the error. Additionally, the number of times that message appears in the tooltip is incremented by one with each refresh.