Plot hole: Perceptor discovers that the reason for their malfunctioning is because their Cybertonium has deteriorated after millions of years of being exposed to Earth's atmosphere. The key word here being 'millions'. This explains why the original Transformers who crash landed on Earth (4 million years ago) are affected, but newer characters like Perceptor, Powerglide, Hoist, etc. are affected despite the fact that they have only been on Earth recently.
Question: When and how did the Great War end? I know the original Transformers ended its US run after the 3-part Headmasters, but Generation 1 continued on in Japan in Super God Masterforce, Victory, Zone, Return of Convoy, and Operation: Combination. Which cartoon ending is considered "official," the US one which finished its run in the 80's with Headmasters or the Japanese one that ended in 1992 with Operation: Combination?