We are using the Twitter widgets.js SDK to trigger some web intent links for users to Tweet a pre-populated message. We’ve noticed that on desktop Chrome and occasionally in other browsers, the Web Intent will pop open a blank page. Clicking the link again will pop open a blank page with a “Continue” link.
The blank page seems to be dropping a cookie:
document.cookie = "app_shell_visited=1;domain=.twitter.com;path=/;max-age=30"; location.replace(location.href);
Any ideas what is triggering this behavior?