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Depending on how you cause the scroll to happen, Google might render the page unscrolled or scrolled.  Usually if it's done in the onload() function via Jscript, Google will execute that script and render the page as it is after the script is executed.  I've seen examples though where using JQuery's document ready function is NOT executed by Google to render the page. Test in Google Search Console, using Fetch and Render as Googlebot.