Angraecum diderii sudden demise

[Dusty Ol' Man]

All seemed to be going well with this plant. Putting out new leaves and roots, as it should. Then, lo and behold, a spike with bud! But the bud got trapped by the bark texture (mounted on cork). Carefully tried to free it up to no avail. The flower attempted to open but didn't quite make it. Then the flower died. Then the leaves started turning black and falling from the stem. Within a week everything was gone. Just some green root tips left. I have no idea what went wrong. The conditions had not changed since I received the plant in October. Same temps/humidity/photo period/light level. And the watering schedule was a daily soak with a spray bottle and bi-weekly dunk for about 20 minutes, every other time with 100ppm nitrogen ferts. Rainwater with Klite rainwater formula.

Anyone have any ideas? I have been over the habitat norms for the species and my conditions were right in the middle. I'm lost on this one.