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Chucky Speed bug
When Chucky performs a Slice & Dice at a window at the same time a survivor goes to vault it, it cancels Chucky's power and puts it on cooldown. In previous versions, this would just cause Chucky to have to wait to get his power back before going back to normal, which is already a bug in its own right. However, in the FNAF update, when this situation occurs, once the power is off cooldown and Chucky starts a Slice & Dice, it immediately cancels Hidey-Ho mode, and so long as the player is holding down their M2, they move at Slice & Dice speeds permanently. This only ends when the player lets go of their M2, where the power's cooldown begins, but when the cooldown ends, Chucky can just do it again, with no signs of anything being able to stop it.