Revealing mistake: When R7 goes to plug in to the socket to look up information on Fives, he moves right in front of one arm of a droid charging station in the room which should be in front of him. (00:16:32)
Continuity mistake: When Ahsoka tells Rex to go to the briefing, the rectangular pouch thing attached to the right side of his breastplate is missing. (00:09:24)
Revealing mistake: When Ahsoka and Rex walk onto the bridge of the Star Destroyer, in one shot the right part of his kama is partially transparent, revealing his thigh armour beneath it. (00:08:05)
Answer: I would say his death in Phantom Menace was more of a controversy. He was a fan favorite character from the movie, and his fight scene largely regarded as the best part of the movie. It was more he was brought back to please the Star Wars fans and few, if any, had problems with it.
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