One of my keiki's have pimples on the leaves. I have inspected the leaves and see no pests, fungus of any kind, no leaf discoloration either. I did take a partial of the leaf and scraped it a bit to see if they were pustuals, not that either. The parent plant Catt. Christina Princess is not showing any signs on its new growth as well as the other 3 keiki's I got from her. Any ideas ???