See if you can find a cool, breezy shady spot to hang it for a week or so and see if it recovers. These are plants that do really well in the Pacific Northwest where I originally lived. They like cool, moist conditions. I'll bet your temperatures have been going up lately, yes?
Are those bare stems where it's been dropping leaves? When you water it, does the water drain out the bottom pretty well? If you hang it in the shade, maybe let it dry out for a day or so, as well.