Phal bellina limp transparent leaf

[guccisimo85]

This phal bellina has a leaf this quite limp, yellowing at the edges. Also noticed today that it is quite transparent - you can see your fingers very clearly through the leaf if you hold it up to the light. The other leaves are noticeably thicker and not limp.

Only thing I can think of is that I just got it recently and it was quite dry when I received it. I soaked it today for 15 minutes to hopefully give it a chance to recover. I’ve also moved it to lower light for now, as it was getting around 600 PPFD / 3600 fc.

Any thoughts on what might be wrong, or is it common for this to occur if they dry out?