Hitting browser 'back' button sends me two pages back

How to reproduce:

• Go to home page of instance
• Click 'Next' to go to page 2
• Click on the title of any post of page 2
• Click 'back' button in browser UI

=> Browser shows page 1 instead of page 2, although URL indicates page=2.

I have to refresh the page to make the browser display the correct page.

I could reproduce on Linux (Firefox and Chromium) and Android (Firefox). Whether I'm logged in or not has no effect. I've tested on another instance (lemm.ee), the behavior is identical.