Why Frieza acted like he didn’t know Goku defeated Buu?
In Resurrection F, after Frieza was resurrected. He was surprised to know that Buu was awakened and that Goku defeated him.
But, In Dragon Ball Z. We saw Frieza watching Goku vs Buu from hell.
So, it’s just another dragon ball plot hole.
It’s true that the episode was filler. However, fillers shouldn’t contradict the main story. And as a professional production unit they should’ve ensured that. Filler or not it’s a part of the anime series. There are many people who don’t read manga and the anime series is their only means of knowing Dragon Ball. So, I hope we will get to see more professionalism and accuracy from one of the most successful anime ever.