Unfortunately we had no way of knowing that this wasn’t officially supported behavior. As far as we were concerned, it worked. So we used it. I’ll try to let people know not to use that approach from now on, but unfortunately that doesn’t help us now when we have hundreds of these floating around.
As @Dannii said, it only breaks when it’s clicked to load in the same tab, and pretty badly. Even if it’s only really supported for when people do this by accident, doesn’t that still mean it should be fixed? Especially since it works when the topic is different.