When Memphis is in her office and is asked about flight authorization, there is a very quick frame in which she is wearing her jacket. In the rest of the scene it is on the back of her chair.
After the attack on the ceremony, Bundeswehr soldiers are seen being deployed for security. A deployment like this is however strictly forbidden according to the German law, it is a matter of the police to provide security within German borders.
The terrorists attacking the ceremony in Frankfurt are wearing Berlin police uniforms and are driving a Berlin police van. Berlin police has no jurisdiction in Frankfurt and they would have aroused suspicion long before entering the targeted premises.
The license plate of the ambulance car does not correspond to the German standard.