I just had the same problem that I have had a few times since the new forum went live. Here is what happens: I type a reply on a thread - I am pretty sure this has happened to me on both desktop and mobile, but on this occasion it was on desktop (Chrome, Windows 7). Click on Post reply, and then, rather than showing the thread with my post in it, it takes me straight to a page with only a banner on it - but the URL still shows that of the thread itself. Furthermore, when I refresh the page, the full page and thread loads up and my reply HAS been posted. Screenshot attached showing the thread with its correct URL but with only banner displaying. Anyone else seen this issue?