Any idea what’s up with this glitch?

I noticed this glitch a while back and it seems they still haven’t fixed this. I’m mutuals with an account that has 67 followers supposedly, but whenever I scroll to the bottom of their follower count it’ll say "showing 50 of 68 followers".

This bug persists when I switch through different accounts. Granted, sometimes this person gains or loses followers but it’ll always say at the bottom that there is one more follower than what is visible on their original account display.

Also when I search the account, their profile preview will also say they have one more follower than they "actually" do.

One more thing I’d like to add, this is the ONLY account I’ve seen that does this.

Anyone else know why this is or also experience this?