Colmanara dying while in flower, help!

[ambitele]

Hello,
My colmanara got sick over a weekend while I was gone. The pseudobulb (which is currently in flower) became yellowish and soft, one leaf became brown.
I have been growing this colmanara for a year and a half. When I got it and it finished flowering, it grew a nice new pseudobulb (which now has this problem) and flowered again. When it finished (about 2 months ago), I repotted it with pine bark and placed it in a darker location (since the sun started getting too intensive on the windowsill). However, it did not produce a new shooting, but produced new flowers instead. A few days after it blossomed out this happened... Also: it lost a few leaves recently, but so did my other oncidium
Does anyone have any clues what might have happened? Should I repot it again and throw this pseudobulb away?
(I would include pictures, but can't since I'm a new member...)