Black spots on Dracula Citrina

[Gracielu]

About a month ago, I ordered this Dracula Citrina from Ecuagenera. When it arrived, it had a few black spots scattered on the leaves, but nothing too worrisome. I potted it in a plastic cup with sphagnum moss to acclimate/ keep in humidity. Recently, I have noticed a large amount of tiny black dots all over the plant and browning leaf tips. I believe it is from too high humidity, but wanted input from experienced growers. Any ideas about identification of the problem and treatment for the plant?