No. I see you use Pumpa. I don't know how shares look on it, but maybe it's not that obvious that they're shares of the original post. Maybe it is, and your complaint is the fact that you see the shared post when the original is already present, but I think Pumpa "minimizes" the copies when that happens.
If it's not better, I don't think it's on purpose, it's probably because nobody gave @Sazius a better idea of how to handle those, or just because he didn't have the time to implement it, and nobody offered a patch.