Thanks. I tried to reproduce this in Chrome and Firefox but it works for me. I'm not using anything sneaky or that modifies browser history so not sure why you're seeing this. Which browser are you using?
This affects me too, firefox on linux
Firefox on Windows with Adblock plus. Works on in Chrome. A below commenter mentioned ABP so it might be that.
Are you using adblock plus by any chance? I had to switch to adblock to fix that on ars a while back.