Sorting bug in FC

I find strange bug in FC directly. It does same here on official community site. When you go on your profile -> posts -> sort by "Popular" for example, go in main feed, you have main feed also sorted by "Popular". But if in main feed you try sorting by "Latest" and then refresh feed, you have back "Popular". It remembers value set on profile. Maybe it is meant to work like this, to me it is wierd.

What is your opinion?