how do you access old forum topics? bug in new layout?

I was looking for an old topic in the general forum, from page one, I can use the menu at the top of the page and  move to pages 1, 2, 3 and also pages 113,114,115, but all the pages in between are represented by "..." which the user can not click.  I can not find a button for " next page".    Does anyone know how to navigate old forum pages, or is this a bug?

if you click the '3' the '...' turns into '4...', the '4' being a link. alternatively you can just modify the url.