I use FB via browser and this is constant on iOS. If I am going through my feed and I click a link to another site, it opens a new tab and when I return to the FB tab I see it reload the page and I lose my spot. If I try to scroll down to find the same item I clicked on (because for example I feel like commenting), it's almost always gone. Nowadays I just take it as a reminder that FB is either deliberately manipulating me or just doesn't care about the UX, so I close the FB tab. I'm not doing extra work to make up for their user-hostile decisions.