When viewing a single section using the collapsed topics course format, the section name and the links to the previous/next sections overlaps. You can really see this when the names are long (see screenshot). And you don't see this problem with the Topics course format, so it appears to only be an issue with the collapsed topics format.
So we need a CSS adjustment here. I've added the CSS to add below. Once implemented, the overlap problem is no longer present (see screenshot).
I tested this on 3.7 and on the new 3.8 sandbox -- both exhibit this issue, so the fix is needed in 3.8.
From BW via Asana ticket: