On iPhone or iPod touch and in the last page of a Home screen folder, performing a three-finger swipe to the left will wrongly load the App Library

1. Navigate to the Home screen
2. Double tap with 1 finger on the icon of a folder
3. If the folder has more than 1 page, navigate to the last one
4. Place VoiceOver focus on to any app icon on this page.
5. Perform a 3 finger swipe to the left

As there are no more pages, this gesture should do nothing.

What actually happens is that you are taken to the App Library screen that's new in iOS 14.