This issue is only affecting some devices, the ones we have found that have an issue are Samsung S22 Ultra using Chrome browser, Samsung browser and Firefox, and using an Amazon fire tablet with the Silk browser.
The scrollbar does not reach the bottom of the page, not sure if this helps or not in diagnosing the issue, but the scroll bar will not move once it gets to a certain point (around 7/8 of the way down the page on this particular webpage), the point it reaches also changes if you refresh, allowing you to scroll slightly further.
I have tried creating the smoother instance once the entire page has loaded and even adding a setTimeout function, but this does not work, and seems to break the pins and scroll triggers.
I don't have a codepen although I can try set one up, or I can provide a link to the website in which it is happening on, but would prefer to not share this in public.
Attached is a video showing the issue on mobile
zzscrollsmoothissue-unbvedcq_W2YJTs12.mp4