is attack on titan (shingeki no kyojin) episode 24 filler?

As Eren witnesses Annie's true identity, he recalls the time from a few days ago. While he and Levi are waiting for Erwin and others, Levi wonders why it is taking so long, claiming constipation issues to be the cause, much to Eren's amusement.

Eren then apologizes for making a wrong choice; however, Levi once again states that it was not possible to predict the outcome. At that moment, Erwin finally arrives, claiming that they have the last chance to capture the Female Titan and explains the upcoming operation in the Stohess District.