is one piece episode 783 filler?

The famished Straw Hats sail through a storm. They struggle to maintain course.

Luffy states he'll save Sanji no matter what. On the Queen Mama Chanter, Sanji notices that Tamago's transponder snail is ringing constantly.

Tamago explains that the snail is receiving 'Warning Signals'. At that point, the ship passes by Tarte 28 (an outpost where a platoon of Big Mom Pirates awaits to attack any intruders).

Tamago then tells Sanji not to be stubborn, and just ally with Big Mom along with Germa 66; stating it's what Sanji's father wants.