Call In Editor functions not working in blueprints

Context

When selecting a component on an actor, any CallInEditor functions on the component's class appear as buttons in the details panel.

Problem

The CallInEditor functions don't execute in Blueprint Editor. The repro steps work correctly on a level placed actor, but not in the BP editor.

• Create an actor component blueprint BP_MyActorComponent 
• Add a CallInEditor function "MyCallInEditorFunction" to it that prints Hello
• Create an actor blueprint BP_MyActor
• Add BP_MyActorComponent to it, and select it in the Blueprint Editor
• Press the "My Call In Editor Function" button
• Observe: It doesn't print "Hello" to log. The call-in-editor function doesn't execute.
• Expected: The call-in-editor function executes.

The above also applies to native component classes with UFUNCTION(CallInEditor).