Hi, I have a Dracaena Draco, Dragons Blood tree, that has in the past month developed white spots on the leaves, mostly on the new growth near the center. It’s not mealy bugs and it’s not powdery. I haven’t seen any insects. Some of the spots have grown into holes with brown edges. I am pretty sure that I am not over or under watering, snd I’ve only added a fertilizer once about a year ago. It is in a pot. Please see the pictures, snd let me know if you have any thoughts. thanks!