I've got some sensi blackberry just now, I've been messing around fine tuning with my green headlamp and I've noticed the leafs hanging down much lower than when the light is on.
The pots aren't to wet or over watered, light out rh 52/55% temperature 21.3c/66/67f.
I feed them on a cycle through the light period, the last feed is 4 hrs before lights out.
I can't say I've ever noticed that leafs drooping like that, i might have missed it before but it's highly unlikely?
I'm not concerned about it tbh if I should be then I'm all ears?