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Tabs autoplay script automatically scrolling page down

I have been using @pepperclip’s script (original here) to have Tabs autorotate every few seconds with no problem. However, starting about a month ago, whenever the tabs autorotate, the viewport will automatically scroll down to the Tabs element. This happens in both Safari and Chrome, both on iOS and iPadOS.
I also noticed that this only happens when the page is scrolled all the way to the top. If the page is scrolled down even a few pixels it no longer does it.
Could anybody help me figure out where the issue is?

Here is my site Read-Only: Read-Only

Published site: Published site