Open https://steamcommunity.com/app/292030/reviews/?browsefilter=toprated. This should have shown the reviews regardless the time them published, ordered by "most helpful", which is "Most Helpful (All Time)". But this is what I actually got:

On the contrary, if you choose "Most Helpful (Year)":

I have tested that The Witcher 3, The Witcher 2, Just Cause 3, Batman™: Arkham Origins, Tomb Raider are having this issue. But I have no idea whether it happens only to those released more than a year ago games.