I find it pathetic that they don't even know that Walt Disney played Ferdinand's mom and that Milt Kahl played Ferdinand. I always trusted D23 since they're official but I'm not too sure anymore. Check this out
https://d23.com/this-day/ferdinand-the-bull-is-released-2/
Here is the Milt Kahl interview saying otherwise @2:28
https://d23.com/this-day/ferdinand-the-bull-is-released-2/
Here is the Milt Kahl interview saying otherwise @2:28