Psychopsis 'Lace'

[leeflea]

As usual, so please bear with me, I have a question re: my Psychopsis 'Lace'.
One of the back leaves is wilting. The others are perfect and the stem and the bud are good.
I'm wondering what is causing the leaf to flop over.
I phoned the nursery from which I bought it and was told to use a sterilized knife and go around the edges of the pot and slightly lift the tree fern medium to see if there were any green, healthy roots. I'm afraid the whole potting mix will fall apart.
I didn't do this as I killed one trying to repot it. So, I'm afraid to to what was recommended.
Might someone please be so kind as to provide feedback?
Thank you,
Leeflea.

[leeflea]

All my life, I have depended on the kindness of strangers.

[orchids4me]

Is it one of the older leaves Lee? It just might be that leaves time ....post a pic please if you can that will help us see better what might be going on.
Hang in there

[leeflea]

Hey Orchids4Me,
It might be an older leaf as underneath and in between it and another leaf a new leaf is forming.
Yes, I'll hang in there and thanks. L.

[kmarch]

Is this the same orchid (Onc. Mendenhall 'Lace' x Onc. Mendenhall 'Bill Carter's Mendenhall') you posted about a while back?
Oncidium psychopsis
Is it still growing and spiking in spite of the leaf?