is one piece episode 764 filler?

Two days ago, after Vito whispered something into Sanji's ear, a shocked Sanji asked Capone Bege how they knew that. Bege called that a silly question, telling Sanji that Big Mom possesses unfathomable power and influence, allowing her to find out and do anything she wants.

Sanji took more puffs from his cigarette as Nami, Chopper, and Brook asked what Vito had told him, and he asked Bege for a pen and paper. Bege obliged, and Sanji wrote a note on the paper before handing it to Nami.