Knightfall Event is unwinnable due to Jocasta Bug

Same here. This event has been broken since day 1. She gets to immediately annihilate your team and it does not matter how much effort or time you spent wasted on trying to beat the thing. It takes an extremely long time to clear each wave and it has nothing to do with how geared up or what relic your characters are. It's impossibly hard even at the lowest tiers and JoCasta is broken when you get to her.