I have talked to hundreds of customers troubleshooting the issues their leafy babies are having at home. We go through all the basic questions - What light is it getting? How often are you watering? When was the last time it was fertilized? One question usually gives them pause - How large is your plant in comparison to your pot?
Over-potting is a common problem with new houseplant enthusiasts. Simply put: the larger your pot, the more soil it contains; the more soil there is in a pot, the longer it takes to dry out. It is incredibly important to choose your pot based on the size of your root system. If your plant has a lot of foliage but its root system is only a few inches long - it is not ready to be moved into a larger pot. If your root system is disproportionately small in comparison to its pot the roots can be overwhelmed with saturated soil - and prone to root rot.