Adding a function to a BP Component causes compile errors in BPs that use that component

Adding a function to a Blueprint component causes other Blueprint that use that component to have Errors and must be re-compiled.

1. Create a Blueprint Component.
2. Add a function to the component
3. Add the component to another Blueprint
4. On BeginPlay, Drag a reference to the component and call the function that you added.
5. Compile the Blueprint. Should have no errors
6. Go back to the Component and add another function.
7. Compile the Component
Result: Component compiles fine, but the Blueprint using it now shows and Error and must be recompiled.