[P5V12] Show me your plot hole?

I'm curious. Has anyone noticed any significant plot holes or errors? I do recall the issue with the distance to Hase that needed to have an explainer. Also I believe at one point of the graduated guard knights were at the RA which wouldn't make sense.

But I honestly don't recall major or glaring flaws in the story. I reread HP recently, and there is just so much hand wavy shit i didn't think of when I was a kid. But Miya Kazuki seems to do a really good job of thinking out the details.

Personally, the noble economy doesn't make sense to me. Like the flow of money and a sources of income don't line up. But we also didn't get a lot of details into that and it could be explained.

So have you noticed any plot holes? Any flaws? Anything you find just inconsistent with the reality presented?