Thanks for reaching out to us! 😃
I've checked your site and found Buttonizer on desktop and mobile devices (a yellow button on the right). Were you able to fix the issue?
I noticed that you are using a caching plugin. It's possible that, since you are signed in as an admin and the site is not cached, you saw Buttonizer. After purging the cache, other devices that are not logged in will also see Buttonizer (such like your phone).
Let me know 🙂