> I assume the issue is poor decision making about rule conflicts. E.g., what's higher priority: Consistency, or exact-match? E.g. if "photo" auto-completes to "Photoshop", should "photos" auto-complete to "Photoshop" or "Photos"?

I suspect it's even worse than this. It seems to be something along the lines of "oh you typed pho, and got photoshop, but then typed t, so clearly photoshop wasn't what you wanted, since we already suggested that"

That's the only way I can explain windows "flip between several app suggestions every time a new letter is typed" behavior