Shriveled psuedobulbs
 

Hi, recently miltassia in flower several days ago, which is obviously root bound. The psuedobulbs have begun to shrivel, even though the moss is still wet. Do water anyway ?

No

If the moss is wet but the bulbs are shriveling then you may have other problems to address such as inappropriate temperatures, low humidity, or dead/damaged roots.

It would helpful to know your conditions (temperature, humidity, etc) and a photo too.

Please check the roots.