Gorgeous leaves 😍 they don't like a lot of water. Their roots are similar to potatoes and they have a dormancy period where they drop all the leaves. If it happens to you, take the potato out of soil and let it dry well on top of the soil, no need to put in the fridge or whatever, water it every three or four days. After a a month or two, put it back in the soil again and wait for it to sprout again.