In iOS14, translate movement in the same direction cannot be excessive after the transition attribute is modified. You can check this demo: https://cdpn.io/wss534857356/debug/yLOLgQZ/xnkabZPBDDvM. You can use the iOS14 to open this demo. When you click the next button twice, you will find that it cannot be overworked normally.
<rdar://problem/66638568>
Is this a regression from a previous version of iOS?
The original link does not work but I think this is the reported example: https://codepen.io/wss534857356/pen/yLOLgQZ This shows different behavior between iOS 13.6 and an iOS 14 beta. I can see the iOS 14 beta change in STP 112 but not a ToT Safari build, so this may be a regression that was addressed recently.
Duplicate of bug 215655. *** This bug has been marked as a duplicate of bug 215655 ***