I beat 4/20 mode pre-update without too much difficulty, but after an hour of trying I can't get past 3AM on Night 6 now.
Before, Freddy would only attack if she was in the kitchen and you looked at a camera other than the kitchen. You had to close the right door every single time you looked at Foxy.
But now, she just attacks whenever she gets a movement opportunity, period. So as soon as she's in the kitchen you have to close the right door and if you open it at all, even without looking at the cameras, you're dead.
Combine that with Foxy draining 15% power right from the start and being more than happy to attack once a minute regardless of how you stall her, and I genuinely don't know how you're supposed to beat this even with fantastic RNG. My existing FNAF knowledge just breaks down here.
I'm not sure if it's just some kind of skill issue, RNG issue or if it's downright bugged. It seems unusual to completely change how one of the characters fundamentally works.