It's constant with Android tablet & Ipad. The issue is it's not just a normal pop-up that can be closed and allowing you to continue on the thread that was open. The pop-up becomes looped that can't be backed out of & continue reading the thread... the only option being to close it out and reopen the thread from the start. And sometimes it does it again right away. The other issue is it's suggesting it's from Amazon.com but it's obviously a scam. And it happens at anytime while scrolling down through the middle of thread posts. I'll get a screenshot next time I use my tablet.. I cant remember it happening on my PC though.