Top/right aligned floating group on extra-wide monitors causing issues

I have a floating group on the right side. The background is set to an image. When the width of the screen is extra wide, there is a white gap that shows down the middle of the page. Digging deeper and inspecting the elements, it looks like there is a div that has a default background of transparent (which I guess is showing as white). Even though all my pages are set to a background of black, this div is still showing white.

Not sure if this is a floating group issue or maybe a bug?

UPDATE

I fixed it by putting everything a group with max width 100% and background color black. BUT…ideally the floating group would detach from the right side of the screen after a certain width. Is that something that is possible?