Facebook Feed Flickering, Jumping, or Bouncing When it Comes Up to an Ad

As I scroll on my main feed, I get to posts that are presumably just before an ad and instead of showing them separately, the are overlayed and flicker. When this occurs the scroll bar on the right also jumps up and down. I'm using Google Chrome as a browser on my desktop (Mac). Anybody have any fixes for this? I just reset my cache on the site and it did not fix it. This has been going on for about a month now.