Yeah it’s a bit hard to try to figure this out because of the ‘deepness’ of the UPointLightComponent hierarchy. But as we can see there in your screen shot the PostInterpChange function is clearly ment to do something related of a member variable changing (it literally has a parameter PropertyThatChanged and in the function it is comparing that parameter to a member variable). On top of all that, the function isn’t in a #if WITH_EDITOR block, so it exists both in an editor build as well as in a game build.
Now that I think it, I probably shoult test if that function even gets called in the engine code.