Disney never went into specifics on the reasons why they sent DeMayo packing, though words were published about him having an OnlyFans account (as a viewer?). My purely speculative guess is that they scared up some horny-on-main posts from him, but I have no evidence of that.
Maybe Disney looked into the search histories of everybody who worked on the Zootopia movies and decided DeMayo’s transgressions weren’t so bad. 🤷🏼♀️