Hello everyone,
This is a reformulation of a topic that I created a few days ago. I am creating a new one here because I think it is more a ScrollTrigger+React-related problem and that it might benefit from being referenced as such.
Context
There are two consecutive "sections" that are both a 100vw/100vh. Each section is a React component (in the CodeSandbox below, they're called respectively WorkOverview and HomeAbout). They both get pinned one after the other.
Maybe you clicked on a tab, which caused the window to resize and ScrollTrigger to refresh. Try opening the pen in a new window, and refresh the page if you don't see the glitch. Tested on Chrome, Safari and Firefox.