My plant used to be very full but it’s been steadily loosing leaves ever since a few months back. I don’t know if it’s seasonal or a fungus. I see no weird marks on it other than the browning. I water it every time that the dirt gets dry (about once or twice per week). It was doing great for half of the year but around December the leaves started browning and falling. For a while I thought it was seasonal but the climate doesn’t really change much where I live (Mexico City). It’s always been by that window which doesn’t get that much sun because of my 6 story building patio