Continuity mistake: When Pope Ratzinger and Cardinal Bergoglio are having lunch with pizza and drink, the Pope places a Fanta bottle on his side on the right. When he says the prayer and the shot is from the above, the bottle returns to its place next to the other one and then it is again on the Pope's side. (01:34:45)
Continuity mistake: After Pope Benedict played the piano, the two protagonists are watching TV together. Ratzinger begins the scene with a remote control in his hand; left hand in a quick establishing shot, right when he is commenting on the poor signal. Cardinal Bergoglio puts the letter on the table, with a pen that keeps changing position between shots. Moreover, Ratzinger pushes the letter aside...to reach the remote control, that somehow made its way all the way during a cut. (00:50:00)
Continuity mistake: Bergoglio and Ratzinger are having a quiet conversation at a side table after the Pope's dinner. When Hopkins says the line about "a spiritual hearing aid", the handkerchief he was clutching in the previous part of the scene is gone, and it keeps appearing and disappearing depending on the angle. (00:37:00)