I received the plant from Amazon a week ago, which seemed like in a great shape initially. Looked green, healthy and leaves were not damaged or had any brown spots. But on a closer inspection, I realised that the leaves were all wrinkled at the edges and very small brown spots on the back of the leaves. I have not seen wrinkling of leaves in any pictures on the web, but browning is more common. A few leaves at the bottom fell out when I cleaned the plant. I have watered the plant once thoroughly when it arrived and now after 1 week. I have put it in a pot with pebbles at the bottom so roots don’t rot. Is it a sign of drying plant? I want to fix the problem before it gets worse. Any suggestions?