[brookn]

The plant in question is a huge Guarianthe skinneri 'Guaria Morada'. I have a piece of it that Articuno sent me. It was specimen size and divided, for lack of space, and because of disease (mostly rot) and bugs. The "piece" that I have is approx. a foot tall (each pbulb) with 7" long x 2 1/2" wide leaves, and I got a small part of it with 5 pbulbs. The plant is a monster lol.
I am wondering how often you are watering? I have been keeping mine very dry. Stop fertilization for a while too (if you are fertilizing), I have not used any on my piece, maybe that will help. I also have left mine, once I quarantined it, in with the phals because after they are repotted I hear that you should keep the light low for a while. I think though, that it is just adjusting to your conditions, and some loss after the condition it was in is to be expected. If pbulbs are yellowing, it is probably wise to cut them out and treat appropriately, before it spreads any further.

I did lose the one pbulb to rot, thought you might want an update, it just would not heal. I was afraid it would effect the whole plant, so I cut it out. Since I cut it, the thing looks fabulous. It is not doing anything, no growth, no roots, but it looks great. Leaves stiff and green, no more drooping, now if only it would decide to grow. It is so big though, it looks like Godzilla in amongst all the other plants. The only thing that comes close in size is the Bartley Schwarz. I cannot imagine how big yours must be hee hee.