We have a Promenea xanthina.
It has been telling us that it isn't happy but we don't know why.
We have been growing orchids (mainly species) for 42 years and this one defeats us.
The new growths look good then they brown out.
We have had flowers which are small but lovely.
We have repotted, moved it into different areas and now we are trying it in our garden room amongst the Cymbs.
@nannybeach any advice much appreciated.