On Safari on iOS, if you start scrolling with your finger mostly vertically or mostly horizontally, the scrolling gets locked along either the y or x axis. You can't scroll freely in any direction. However, if you started by scrolling diagonally you can scroll freely in any direction.
This locking behavior persists until you pinch/spread or do some various gestures. I am not sure what exactly the rules for this are, and can find no documentation on the internet.
Is there any way to disable this on a webpage, and ONLY have free scrolling?