Funny Bugs

Hello everyone! today i will shw you funny bug which i faced in Assassin's Creed: Black Flag
I was first island ,i mean on island where we first met stide bonnet.
Then i went back to Jackdaw and there i found this:

Of course then i get closer

Then i found him

In few minutes it get back to normal position.

But this guy was still at his place,hanging out from my Jackdaw.