A simple solution would be to just make the background circle an image(if it isnt already) and make it slightly smaller than the max size so it has a bit of empty space around it. If this is just a normal frame with the ui corner on it to make it round, this might be an issue with the way the ui corner scales the edges, causing it to cut of part of the top, since the scrolling frame likes to make the pieces perfectly flush against the top.
If the scrolling frame is not in a frame, maybe try putting it in a frame and setting the height offset to 1…(1,0,1,0)…ClipDecendants on the parent of the scrollframe.