These bugs happen with UIPageLayouts on mobile devices – specifically when TouchInputEnabled is set to true. The GIFs shown below document my experience using the emulator on Studio, but the results are similar to using an actual mobile device (I had to use the emulator to capture the GIFs easily).
In this GIF, you can see how the swipe animation is buggy/doesn’t transition smoothly.
This is what it should look like (taken without the emulator and using the mouse scroll).
Additionally, swipes made from outside the background frame are registered as being UIPageLayout swipes, as shown in this GIF:
GUI hierarchy:
Here’s a repro: uipagelayout_bug.rbxl (17.8 KB)