To reproduce the issue, try to scroll with the mouse wheel over the UIPageLayout in this file: UIPageLayoutRepro.rbxl (32.1 KB).
It can also be reproduced in my game Car Crushers 2 using the topbar in the dealership.
Normally the pages would smoothly animate in whatever direction you choose to scroll in, without any friction or lack of responsiveness.
Most of the time the the pages won’t move at all, and when they do it often acts unresponsive, unsmooth or unpredictable. It feels somewhat similar the broken touch input animations that I reported about here a while ago: UIPagelayout doesn't animate properly from touch input (Which is also still present as of now)
Issue Area: Engine
Issue Type: Other
Date First Experienced: 2021-10-12 01:10:00 (+02:00)