I was browsing my reputation history (https://stackoverflow.com/users/2047418/filip-bartuzi?tab=reputation), went to the second page and then clicked "back" button to go to previous URI (i.e.first page).
URL changes from https://stackoverflow.com/users/2047418/filip-bartuzi?tab=reputation&sort=time&StartDate=2017-05-03%2019:28:57Z&page=2 to https://stackoverflow.com/users/2047418/filip-bartuzi?tab=reputation but the content of the second page is shown. Also "active page" indicator (orange color) in CSS is on the second page.
Edit:
I've included video showing this bug http://recordit.co/VOXvRZ893t