Yellowing Leaves and Dark Areas on Vanilla Orchid Cutting

[NeonKraken]

I've had a vanilla orchid potted with a moss pole for a couple weeks now, and it seems it is not doing so well. It came from a healthy plant and I took precautions such as cutting (and applying cinnamon to the cuts) the lower leaves and waxing the cut. It's potted in a mix of orchid bark mix and potting soil with small amounts of moss and clay pellets. For watering, I mist it when I can and soak it through the bottom when the media feels dry. I keep it on the top level of a small indoor greenhouse with a cover and grow light. Today, I noticed yellow and dark areas forming on the tips and inner parts of the leaves. They also look a bit shriveled. I don't believe it has rooted yet. What could be the issue? Thanks in advance.