I don't personally see the issue. It's a highly stylised image so there's not any reflections or anything that immediately jump out to me as obviously wrong
> anything that immediately jump out to me as obviously wrong
Trace any light ray through the scene, and you will see they are bending in ways that light does not.
I'm sure we could teach a world model about light, but this image model fundamentally does not understand how light behaves (which is one of the primary things an artist needs to understand).