Hello! I took this codepen from demo page. Made a fork and played with the settings. I noticed that on devices with a touch screen (ios, android) there are friezes. This issue occurs when the normalizeScroll and smoothTouch options are enabled (at the same time).
The problem occurs in version 3.11.5 (beta). When using an earlier version of the scrollTrigger and scrollSmoother, there are no such problems.
Attached is a link to a screen recording video. The video shows how at some point, th