is one piece episode 861 filler?

Katakuri continues to stand in solitude in the Mirro-World, noting that ten minutes have passed since Luffy left. He begins to expect that Luffy will not return, but to his surprise he then sees the pirate approaching him.

Activating his Armament Haki, Luffy charges toward Katakuri and resumes attacking him. The start of the battle goes as it did before, with Luffy being unable to hit Katakuri and getting punished for it.

Katakuri asks Luffy why he did not run away, saying there is no shame in running away from him, but Luffy's fighting spirit does not waver.