There IS the same photo in that scene. It's Stan Lee's cameo again :)

…also shown by the fact that he wasn't surprised when he pulled the cube out of his bag in the taxi.

YES…
The moment Fitz noticed what Simmons was doing with the cube, he picked up on the plan and played along. That's why he said to her, "You may as well have packed my bags yourself."

Yeah, that part really stuck out to me too. Such a real-life expression.