tbh though, i wouldn't actually be surprised if that was the case based on limited personal experience with "celebrities" - i can't name names but this one celebrity was working with someone on a professional basis, had been for a long time, initially started out as a human being lol talking and discussing work personally, nice and friendly actually, but then, after years of celebrity status, ended up communicating thru celebrity's PA - it was actually hilarious - the "pleb" (professional person) would ask a question, about the work project, all professional and polite and normal, and the "celeb" would ignore the "pleb", mutter to the PA, and the PA would then repeat the message to the "pleb" - and this was FACE TO FACE! insane really... but this one celeb really sadly evolved into a right arsehole although does attempt to come across incredibly charming on TV and in the media in general lol
so yeah, i really wouldn't be surprised... don't forget, these guys do tend to live in a bit of a bubble really... on a different planet to us plebs really LOL