u/Aggressive-Image5896

Hi all, my JM has new leaves and they are different from the old ones in size and color, they are much bigger and just green. At first I thought those were leaves from the rootstock, but when I tried to prune them off I saw that they grow on the same branches with the green&pink leaves. Is that normal? Did I do something wrong that caused this to happen? What should I do now? Thank you for your advice