Thanks for the update @GreenSock, I don't notice a difference right now... cleared chache and all. And the problem is in all browsers for me. Just to be sure, because I just noticed I didn't go through the steps to replicate in my last post:
Scroll down either to section 1 or section 2 (after section 3 it doesn't glitch, I'm guessing because its where the ScrollTrigger with snap ends), then resize the codepen window (vertically or horizontally). On the next scroll, it will suddenly jump and when you scroll back, it doesn't let you go beyond the section you were in.
Here's a quick screen recording I just did in Chrome:
https://drive.google.com/file/d/1OrJvjuE9ieHdgcWqqZZpRwVC83hv200Z/view?usp=sharing
Hope this helps!