is one piece episode 859 filler?

On Nuts Island, Perospero and Amande try to stop the rampaging Big Mom from destroying the island when Perospero sees Luffy and Brûlée right below him and Big Mom. He points Big Mom to Luffy, and she throws a large section of the peanut tower at the Straw Hat, forcing him to run away with Brûlée in tow.

Perospero creates a Candy Wall, and Luffy tries to break it, but his Gear 3 punches are ineffective without Haki.