My larger one was deformed until it got to 5 feet and it grew out of it. It didn't appear to be due to excess sun, nutrition, soil health, insect pests,fungi or anything else obvious. It is about 7 feet tall now. A smaller one also displayed the deformed leaf thing for a while before it snapped out of it and woke up to itself. Its spot,climate and conditions were also perfect or even better than that.