Guys there is nothing wrong with it since I have been deleting them since version 2.0.13.
Just go into the mod control panel at the bottom, and check the shadow topic to be removed.
i think you misunderstood.
i didnt say there is any problems removing shadow topics. ttbomk, there isnt.
i said there is a problem with shadow topics "spontanously combust", i.e., they evaporate after a time even if you would really want for them to remain in place.
(it seems that what does it for the shadow topic is someone navigate to a shadow topic through the "next topic/previous topic" links)