Floppy limp 2 leaves.

[SouthPark]

Early - hi there! Roughly how long has that phal been in semi-hydro for?

I haven't ever tried semi-hydro before ....... and I recall something about the plant needing to transition to semi-hydro ------ and that transition involves something like old roots dying off, and the newly devloped or developing roots become adapted or accustomed to the relatively wet conditions associated with semi-hydro.

Check the roots to see if the roots look ok. If they're soft or mushy, or not a healthy looking colour, then could consider washing the roots, and temporarily grow this orchid in regular media (eg. 8 mm average diameter scoria pieces).