is attack on titan (shingeki no kyojin) episode 88 filler?

In the past, a young Eren Jaeger sits dozing under a tree and hears a short-haired Mikasa Ackermann tell him that she will see him later. Moments later, he wakes as if from a dream and Mikasa tells him they should head home from their task of gathering firewood.

He does not remember the dream, but Mikasa points out that he is crying. In present day Marley, Ramzi shows Halil his hidden stash of coins where he plans to stash money until the sack is full.

That will be enough for everyone in their refugee camp to live somewhere better.