Nitrogen toxicity, leave/shoot grew in cover of others and you just pulled him out from dark, direct wind blowing constantly into that part.
I have 3 versions ...
All the Best !
She seems a little more perky now. It was close to lights on so it might of been still waking. I know none of the fans blow directly on her. And I suppose a slight nitrogen toxicity but I don't think enough to make one branch wilt. Thank you for input.
Looks like the beginning of Nitrogen Toxicity in the plant.
Dark green glossy leaves, tips curling down, leaves arched.
Lessen up on the N and it should recover.
Good Luck!