is bleach episode 329 filler?

Mayuri removes his bracelet and contact lenses, warning Inaba about the dangers of a cornered animal. Inaba asks Mayuri when he switched places with the Reigai.

Mayuri reveals that he hid in the Dangai and defeated his own Reigai copy when the Reigai lieutenants entered the Human World. He claims that he took so long because the people that were supposed to come to Soul Society to take it back did not show up.

Inaba laughs off Mayuri's remarks and Mayuri uses his extendable arm to grab his neck and tie him up.