So 11 days ago I took this photo of a new root on a plant that lost almost all its roots when I unpotted, divided, and mounted it:
The p-bulbs are plumping up nicely:
then yesterday, to my horror, I peeked at the roots...
to see this...
My first guess is staying moist for too long but it doesn't quite look like other rotten roots I've seen. Does anyone know more about this? I'm worried this might be happening to more roots than this one and I don't want to take a counterproductive action.