Ctrl+F5 refreshes all files (images, style sheets, etc.), that's a little heavy juste to force the browser to reload the page, a simple F5 should be enough, but even that should not be needed: he should be able to render that list on its first try.
Otherwise try resizing a little the page to force it to redraw the list?
I had no issue with that page in Firefox, I have not much tested in Edge, but it seemed to work.