New Star Wars series The Acolyte

SaintInBucLand said
There was also some bad writing in it that breaks canon. Ki-Adi-Mudi was in this episode and he has a very famous line in Star Wars episode one The Phantom Menace saying that the Sith have been extinct for a millennia.

If he is around to witness the existence of this sith that trained Mae, then the line he says from Episode 1 makes no sense.

Well, we don't know that this is a "Sith", to be fair
We also know the Sith being extinct was BS when he said it. A lot of this content from pre-New Hope is specifically telling us just how much hubris the Jedi had and how it led to their downfall. A Sith Lord existing literally under their noses being a prime example.

Edit: I'm not necessarily saying you're wrong, but I don't think this is firmly breaking canon