Not a shadowban, but still a ban (?)

I'm facing a weird experience.
Today i noticed that the last 4 posts have reached a low ER so i investigated more deeply.
Analyzing the last post, i can see it in the popular of every hashtag but not if i browse it from a private session.
So i thought i was shadowbanned but the post is actually present in the hashtag FEED.

What kind of ban is this?