Oncidium turned yellow and shriveled up

[solstice]

Hello,

After much lurking I was prompted to finally join this forum and create a post because one of my Oncidiums turned yellow and shriveled up over the course of a week.

It' a relatively young Onc. Space Race and was potted in bark. The bulbs took on a really unhealthy yellow tint, lost all their shape and became quite mushy to the touch. Roots seem okay but slightly dessicated. I can't tell if that's because of the potting media as I watered it regularly every few days.

I'm not sure if the attached photos are visible as this is my first post. Google hasn't been of much help and I'm hoping to avoid this spreading to my other oncidiums.