Deciduous leaves are self-protection measures for plants in the case of water shortage, so don't worry too much.
I suggest you:
1, combined with plastic surgery, cut off a small number of branches that are too dense and too thin to reduce the transpiration of leaves;
2. After the soil surface is dry and hard, water it again;
3, often spray on the leaves.
4. Keep it in a place with poor light for a period of time. It is normal. Goodbye, bright light.
If you don't fertilize first, it will be counterproductive.