Visible crew/equipment: At the start, while Bex and Ham are talking about Andi's real father, Andi comes downstairs to ask if she can have the disco ball, and in the overhead closeup of the ball we can see the reflection of the automated camera as it turns its lens toward the mirrored ball. (00:00:45)
Revealing mistake: When Andi walks into the library (this is not Andi's dream) it cuts to the librarian sitting at her desk and we can see the shot is flipped - note the bookcase and the librarian's buttons. (00:10:40)