During the serving scene Frenzel fires his gun ordering everyone back to work, and Sasha mops his face which is dripping with water. But beforehand, when Sasha glared at Frenzel who was pointing his gun at this head, his face was dry.
When Sasha moves in to help the man dishing out food who was beaten, an SS officer points a luger at him but in the next scene when he fires in the air and tells everyone to go to work he is holding a Walther P-38.
Several scenes show smoke from the burning of corpses, but corpses at Sobibor were disposed of in mass graves. At some camps the Germans had the graves exhumed and the bodies burnt to dispose of them. At Sobibor that only happened after the uprising, when Heinrich Himmler ordered the camp be closed down, the buildings demolished and trees planted over the area.