Restrepia lankesteri. new leaves stop growing and die.

[AdamSeward]

The one in the photo never grew any new leaves and so eventually died. The roots had always looked OK. I have a keiki of it in a different area with brighter light (now even brighter as I added full spectrum LED lights a few months ago). This one is growing slowly but surely. I suspect the original one just wanted brighter light. If you can, I would try that with yours.