Diagnosis & Prescription
Leaves were dying from the roots
Overwatering leading to possible rot.
Watering the plant less often and allowing for the soil to dry out before watering again. Recommended if stems were damaged in the middle, not attached with a healthy part to the soil, try to remove them gently and propagate.
Watering less frequently and not allowing the plant to sit in water for extended periods of time will help reduce the risk of root rot. Additionally, placing the plant in a warm sunny spot can help the soil dry out which may help the plant in the long run. It is important to try these different techniques and monitor the plant for any updates on conditions.