possibly lack of water, wrong light conditions or fluctuating temperatures. where abouts are you [[location] and is the plant in a conservatory or outdoors?

welcome to GoY too :o)

I live in the Florida Keys. They love my back porch,it's in the shade with good air circulation. In the winter if the temps drop I bring them in.
I found a problem, under the leaves had little black dots I think it may have been eating the leaves. I cleaned under the leaves with a Q tip and alcohol. I also noticed if you touch or move the soil tiny bugs would fly around. I took out a couple of inches of the potting mix and added new on top. That seems to have worked so far. I also read you should let it dry so the bugs don't return. I water it when ever it starts to feel dry before it droops and I also fertilize regularly.