Thank you!Thanks for the details!
Here is what we got back from our ad team:"And readers should be able to continue to scroll past the ad, without clicking it- like you mentioned. So far I haven't seen any of the full interscrollers displaying on the site or causing any scrolling issues. If you're able to get a screenshot from that reader that would be super helpful. "
Ok, if I see it again, I will screen shot it. I think it may have been a slow-loading issue with my phone. It only happened for those days. I deleted a lot of photos, and my phone is loading faster now.
But, when it was happening, it was only the first ad on BYC pages. It didn't happen on any Backyard Herds pages.