Say more about your repotting approach and culture in the new medium... I’m finding that things I thought should thrive on mounts for me. Are not. Thinking your experience may hold a clue.
The swc (semi-water culture) technique is a 3 layered system. See pics below for demo. Best pots to use are see through clear plastic pots to monitor roots.
1. Bottom inch is clay LECA pellets.
2. Middle 2-3 inches is bark/perlite/charcoal mix.
3. Top half inch is NZ moss.
4. The plastic clear pot sits in water (tray) that feeds clay 3-4 days. It usually dries one day before watering.
This method delivers constant water and moisture to roots. Indoors, the plants dry in a day! This way it maintains at least 3-4 days of water supply and keeps high demand plants like violaceas happy.
The clay pellets keeps aerial roots dry (but humid) above while allowing new ‘water’ roots submerged. Water-roots grow into water and do not rot (unlike aerial or bark roots).
Most of my Cattleya species are in this culture and they love it. I just dry them in between watering longer in winter (2 days more to dry).