Nah, they were new bugs, not ones present in the original game. Bugs in the original graphics mode that made some parts too dark and others too bright, for example. Or the wrong texture being used on the wrong surface. That kind of thing.

I don’t mind if bugs from the original release are left in there. IMO, if it was part of the experience back when the game was new and was never fixed, then unless its some egregious error that could brick your console or PC, I think it should be left in exactly as it was. But new bugs that were only present in the Anniversary and later MCC releases, that’s just embarrassing for 343/Halo Studios.