Compiling after placing an unconnected return node does not yield compiler results nor warnings

I noticed this while executing this in [Link Removed].

Repro:

1. Create a new blank Blueprint project with no starter content.
2. Right click in the Content Browser and create a new Blueprint class based on Actor.
3. In the My Blueprint panel, create a new function and focus its graph.
4. Right click in the graph to search for and place a return node.
5. Click compile in the Blueprint editor.

Result:
Compiling completes successfully, but the compiler results are empty and no warning is generated on the return node.

Expected result:
Compiles successfully, compiler results yields warning, and a warning appears on the return node.

Frequency:
3/3