The crumpled photo strip dropped by Thug #1 disappears during the fight between Diana and Thug #2, only to re-appear, uncrumpled, during the fight between Thug #2 and Wonder Woman.
Como lets go of Diana's hand while helping her into the torpedo tube but is holding it again in the next shot.
The Russian device has the words (transliterated) MOY BOMBA printed on it. It just means MY BOMB, but is grammatically incorrect due to gender inconsistency. It should read MOYA BOMBA.
Steve presents $5 million in a large chest to two bad guys and they manage to fit the money into a much smaller briefcase, the brown one. The black one housed a portable phone, which is why the subsequent camera shot zooms in only on the brown attache case. But that huge chest had been stuffed to the brim with high-denomination dollar bills.
When Diana is expelled from the torpedo tube and changes into Wonder Woman, she is clearly in a swimming pool rather than in the sea.
In one scene where the submarine is shown moving off from the pier at long beach, the propeller is not turning, so the sub could not be moving.
When Mr Zukov is about to shoot Diana Prince, he is warned about bullets having a tendency to ricochet in submarines. Later when Wonder Woman is on the submarine he fires three shots at her, either forgetting or ignoring the earlier warning. Wonder Woman deflects the bullets which must only increase the risk of ricochets.