My fiddle leaf seemed to be doing well over the last three months since we got it. It gets a lot of light from what I can tell and every month I feed it with some fiddle leaf plant food from your website. However, today, one large leaf on the bottom fell off after suddenly turning yellow. The remaining leaves seem to be okay still. Can you share any insight as to how I should prevent more leaves from dropping? My plant is about 4 feet high and every week I give it three cups of water. Thank you so much in advance!