Iāve had this monstera for close to 4 years and the bottom leaves started yellowing. I cut off 3 a few months ago and two more are starting to look yellow. It sits in this corner with light from the sliding door (SOUTH) and the window behind it (EAST) Is this old growth? Or a watering issue? Iāve never had an issue with this plant but it hasnāt been putting out new growth lately