Also, it’s a royal Flush not Poonsak I originally thought.

Thanks for any input.

this Lacunosa hangs in the same spot just higher up in front of the sliding glass door and it’s doing great.

Could a vent be blowing directly on one but not the other?

Do they have all the same culture otherwise? (Watering, potting media, etc)

I have a Lacunosa Sno Caps, and on the plus side it blooms constantly. The negative is that without warning the leaves start to yellow and die off. It is a bit fussy and I understand Lacunosas don’t like to get to dry. Someone here called it possible dry rot.

Check the roots for mealy bugs.. Check the roots for rot. It's always either with mine with the same exact problem.

Mike

That could be it. Since I’m so paranoid about overwatering I tend to underwater. I guess equally bad for the plant.