Multiple turtles cause a lot of lag (Singleplayer and Realms)

Multiple baby turtles (in my case 9-10) hatched together in a sand area generate a lot of lag in the world, making the player unable to break blocks or even open its inventory. I found this bug while trying to make a turtle farm. When the baby turtles hatched from the eggs, the world suddenly stopped working just in the area near the place where the turtle farm was. I don't know if this also happens with adult turtles because I haven't tried it yet.