Every way I find a new way that modern Windows is broken.
If you're ever renaming things and notice that they're not auto-sorting, I figured out what to do. Open a new tab, and this time make sure you start from C:\, then navigate back to the folder you were working in. Now get back to work renaming things, and watch them auto-sort like they should.
The problem is the stupid Quick Access thing. It's not a set of shortcuts like you might think it is. It's basically a whole fake file system on top of your real file system, and it's missing features while giving absolutely no indication that those features are missing. Things just seem like they're not working for no obvious reason. Microsoft has no explanation for any of this, so I'm not sure they did it on purpose or even know they did it.