Hi Can anyone help me I was bought a Monstera Thai constellation plant which was grown from a cutting and only has 2 leaves. The newer leaf is fine but the bigger one has a brown patch on the top with discolouration on the bottom of the leaf. There is also some discolouration on the stem. I can’t see any pests on it at all. I’ve only had it a couple of days and not sure what to do to help it. Any advice or ideas would be appreciated. Thank you