So today when i logged into the game i noticed i could use Killer Bee BTs on 3* now. Im pretty much sure it was 4 star before. So i was wondering if 3* BTs is a bug or you made it like that?

Now some people are saying its fixed but the bug is till working for some people. Some can still use BTs at 3* and some people can not, Any info about this problem is welcome :)