is one piece episode 875 filler?

On Funwari Island, Prometheus and Napoleon return to normal as Big Mom walks up to the wedding cake, and the Big Mom Pirates tensely observe from afar and wonder what effect the cake will have. With the cake at Big Mom's fingertips, Bege insists that they leave and carries Chiffon away.

Chiffon pleas with him at first, but eventually accepts their departure and expresses her confidence in Sanji's culinary skills. Big Mom scoops out some pieces of cake, puts them in her mouth, and swallows.

Suddenly, she freezes up, and falls on her back.