I've noticed that Safari on iOS autocompletes so aggressively that if you go to a full URL on a site (e.g. https://example.com/somesection/page.html) you can pretty much no longer type just "example.com" into the address bar. It will pretty damn aggressively autofill in the URL to the page you visited earlier.

Maybe it was a bug in an earlier version that's been fixed, I don't do a whole lot of browsing on my phone. But that was (or still is) easily the most obnoxious browser bug in my recent memory.