Unless sexual assault was in play, this is maybe the most ridiculous story I've ever heard.
Could such a move happen without consent from Brown and Tatum? Absolutely not. Were they involved in a mutiny? There's a very good chance:
Tatum: still resistant on Ime's defensive system. More energy exerted which leads chance of injury and/or breakdown late in season and/or not as much accolades
Brown: Maybe upset about KD rumors.