Lately with either FL or GMT2 i find that it says "It successfully followed X user". But then checking their followers, doesn't show my account.
So talking with Support of GMT2, he recommended i try with on mobile app to see.
And indeed i can't follow users on mobile app. If you search YT videos "can't follow on instagram".
They show they follow(hit blue button "follow"), changes to following and instantly returns to "follow" button.
And for me it doesn't display any warning. And…