Have you checked your run off this is similar to another post I just seen. I have had the same thing happen in the flowering stage due to root lockout happening what’s your feeding schedule do you water water feed . Water feed water? Just curious Bc my issue was I let my soil get heavy build up and it really messed my plant up
Over night the same as yours if not worse. Hate to see this but it also could be from
Direct wind if you have fans constantly blowing on it?