Flowers but no growth in one year, plus shrivelling pseudobulb

[bellatulum]

Hi all, I was wondering if anyone has had similar experiences to this and if so, can give any insight on what I can do. Here is the issue:

Last October, I purchased a Dendrobium bellatulum and it looked fine. It bloomed for me, several times actually, but it has never made any new growths. In fact, it had lost a pseudobulb, it completely dried out (it's the skinny one on the left in the before image).


The only thing it had grown was two roots, but they never grew very long and have since ceased to grow. Right now it's taking energy from another pseudobulb which is causing it to wrinkle and shrink and at this point I'm worried the plant it going to die because it's not producing any new roots and all the leaves are gone now.

The way I'm growing it is on a mount with some sphagnum moss in my home. I understand this needs a bit of a winter rest, but I've been spraying it lightly because I'm not sure the humidity in my home is enough to sustain it while it's dry.

My question is, has anyone experienced this and did your plant survive? What should I do, or is there anything I can really do?

Thanks!