When Agatha and Arthur enter Wally's apartment we see their faces have been disguised with tattoos to ensure they are not recognized by facial recognition software, but just seconds later while they are looking over the bodies of Henry Blomfeld and his aid all of the facial tattoos are gone.
When the pre-cogs walk in to the building that holds the milk bath for the first time, it pans overhead and the table/bed they lay on is inverted; the head piece is away from the center.
There is a plaque outside a medical room which has a QR code and the words "BIMR SUITE 4." However, scanning the QR code actually results in the words "Conference Room."