Yandex.Lenta has a bug that I noticed a long time ago.
And here it lies in this: when you refresh the page, the read entries do not always disappear from the unread page, but hang there until blue in the face.
And the link "mark everything as read" at the same time does not work.
')
Plus, there is no page list in the unread tape, so you cannot read only fresh messages, you have to go to the general tape and read everything.
And at one point, everything starts to work, but someday, it breaks again.
Moreover, such a bug is not only found in me, judging by population polls.