Skip the rig and test on the website for a more “realistic” experience to confirm/check yoru CSS In the rig matches the CSS in the rig to be sure.
I tend to set my HTML/Body to the
body {
position: absolute;
top: 0px;
left: 0px;
right: 0px;
bottom: 0px;
overflow: scrol;
}
But to be sure I’d have to whip open the rig and test.
So your problem is likely a CSS issue than a rig issue but test rig/website to be sure