Hi SDLondon ,
Thanks for the link!
It seems in the custom CSS you've writteN there is a part that says right: -680px;
on .buttonizer a
.
I wouldn't recommend this and set the position on 0% from the right side via the Buttonizer dashboard, then you'll get the same result and it will be visible on mobile devices (responsive).
Just like this:
Let me know if this helps 🙂