Light components stay visible if "Actor Hidden In Game" is checked. This issue occurs even when other components (such as a static mesh) are no longer visible. I tested with a static mesh component to see if the issue was affecting other components, but it is only affecting the light component.
Expected: Light should be hidden in game / not visible
Results: Light is not hidden / light is still visible (even when other components are not visible)
Head over to the existingAnswerHub thread and let us know what's up.