I got this plant about 2 months ago and several weeks ago I noticed that these strange brown/ yellow patches forming on the underside of the leaves of the plant. Later these leaves would turn yellow and then droop. I eventually cut these leaves off, but now they are coming back. I recently sprayed the plant with neem oil just in case, but what is happening to the leaves and what can I do to stop it?
I water this plant when the top 2 inches are dry and it is located outside on a shaded porch. I also recently replanted it about a month ago.
Thank you!

It needs more light! If you look at the photo below you will see the two arrowheads that came from the same mother. The only difference is the amount of light they receive. The white leaf has much more light than the darker ones. The dark colored leaf plant sits in a dark corner and the white leaf plant sits in full light all day.