Potinaria Hoku Gem with wrinkled leaves

[flyfishdoc]

I put this plant in semi-hydroponics in August. It promptly shot out 5 new shoots in the first 2 months and was doing well until a month ago. It began to get wrinkled leaves. Some of the old pseudobulbs are wrinkled and the leaves cracked, which I can understand. But all of the leaves are wrinkled now.

It has never been without water, getting fully watered & fed at least once a week, topped up at least mid week. It gets the same care as all my other orchids, which are all in s/h and doing well (phals, onc, mitloniopsis, paphs)

Any ideas about what to do? Does this mean it is not meant for s/h (altho it sprang to life when first put in s/h)? My thought is to remove it from s/h and put it back in bark