is bleach episode 238 filler?

In the Seireitei, at the 4th Division barracks, 4th Division Captain Retsu Unohana walks down the hall with her lieutenant, Isane Kotetsu, as a Shinigami greets her before stating they will need more help because many new patients have been arriving. Unohana admits that she knows they are short-staffed and states they will make do before turning to Isane, whom she tells to do what she can to help them.

Agreeing, Isane begins to walk forward before stopping and turning to face Unohana. When Isane says she has one question, Unohana smiles and asks her what it is, only for Isane to look down before telling Unohana to forget about it.