That bug regarding the Anniversary event not crediting towards challenges was affecting all gamemodes not just Junkenstein. And also why would they “purposely” bug something in a game if that’s probably one of the stupidest theories I have ever heard like I have NEVER heard a game developer purposely putting a bug in a video game. Even then expect the bug to be fixed by tomorrow which believe me it’s dumb it happened at the first place but what can you do about it.
You may also ask why it’s taking them almost two weeks to do that which it mainly has to with the fact the each patch has to go through a certification by Microsoft, Sony and Nintendo which takes about 1-2 weeks to do to be sure there isn’t anything broken on their particular platform and plus it cost a lot of money to put out just one patch for each platform which I think they held it off for a little more to also include to cowboy’s new name Cole Cassidy along with all of the re-recordings they had to do.
Edit: The bug has been fixed now