I have one that was doing great and than all of a sudden all the leaves fell off. I don't mean in a couple of days I mean I walked by it and twenty minutes later went by again and the leaves were all in the pot. There was nobody there but me. Oh, my what can the matter be. The stem is still nice an green and appears to be okay.
Can you answer this question???
make sure that it isn't to dry and hope it comes back I have lost leaves not that quick but they will come back