Oh boy, I’m sorry. That’s definitely not how it’s supposed to work. As fas as I can tell it has something to do with the way Windows handles High DPI Displays. I was able to reproduce the issue on my machine while Windows was running in a VM this morning. There’s a setting (Display -> Advanced Scaling Settings -> Let Windows try to fix apps so they’re not blurry) that seems to fix the size *and* controls (don't know how that works, tbh), but it was somehow only available when booted into Windows proper (Maybe a driver thing?). The resolution is supposed to be 800 x 1600.
Again, I’m sorry.