Hello B I wish I could help you
I had the problem of droopy leaves on the last grow and I never did find out the cause
It was ethier overwatering, the lights, the humidity, or whatever ?????


Lets see what suggestions you get


love mand xxx


Oh I'll just add a pic of how mine went, does it look similar ???? ........... it happened about a week after switching to 12/12 and they never fully recovered