Her lowest subtest scores are the ones that have a significant motor component: Block Design, Coding, and Symbol Search. Motor output (the physical act of writing) might be something of a bottleneck causing some frustration if her hands can't keep up with her head. Her working memory is excellent, and this could easily lead to boredom or frustration with things like being asked to show her work on math that is too easy.
I second checking to make sure she isn't reading in the bathroom or by the light coming under the bedroom door...I was always bored in school, but the only times I actually fell asleep in class came after nights when I had stayed up reading or when I was actually experiencing an illness or auto-immune flare.
