Scrolling posts "jumps" back up when reaching end

After scrolling down to the bottom of the post, the posts seem to scroll up and down without any user intervention. Its quite hard to explain so I have attached a screen recording of it.

Current build:


I have had a bunch of users reporting the same with different browsers and phones.

Can you try in safe mode? Is this limited to a specific theme/plugin?

It doesn’t happen in safe mode, and I am pretty sure there are any non-default plugins active on the site that could mess with it?

I see, my recommendation would be then to run a binary search.

Disable half the stuff, see if it happens, other half, quarter and so on … a bit of a tedious process but it should help you find the culprit.