Northender said
"I use an iPad for Facebook. When I’m scrolling through posts my iPad will suddenly go back to the top on its own. Also if I click on a link and then go back to Facebook, Facebook goes back to the top rather than back to where I was in Facebook. Is there any way to stop that from happening? It’s very frustrating.
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Are you using a browser to access Facebook? You can try clearing your cache and temporary data. You can do this from your web browser's settings or preferences.