"It's not a hallucination, Buck, but now I'm a little worried." Because the last thing he remembers, he'd left Bucky in Wakanda to get unconditioned, but now here he is with short-shorn hair looking just a little bit older than he had before.

"Time works differently here," he explains, briefly. "Peggy was here. She was young." Yes, Steve explains this factually but he does sound like he's trying to hold back his sadness about it.