what do you think the situation is, how long will it take?

Nasty......... Plants DO NOT draw moisture into the leaves from the air rather than through the roots, this is pure fantasy! Yes, light during the dark cycle is causing the flowers to re-veg, that is why they look funny. Could also be messed up from growing from 12/12 from seed, which is quite effedup for cannabis. Either way, you still have some weeks before these are ready, wait until there are 98-99% brown pistils before harvesting.

The heartbreak of reveg 💔 That is when they go from flowering mode back into vegetative growth. And new stems come right out of the flowers. Has her light cycle changed recently? Any light leaks at night?

the reveg? oh its gonna take a while. there must be a fuck up with your timers. those plants are revegging hard by the looks of it.

Hey man. Well, tbh with u bro. There really isn't all tat much to it. So I'd say its done. Why are you experiencing such airy buds is your RH is too high and your plant is drawing in fluids from the air therefore missing out in the nutrients in your soil. You'll know if this is the case by how quick your soil dries out. If you always have wet soil or if takes days to dry up then you know y. Your plant is taking moisture through its leafs to feed herself and the bud is losing out. But I'd consider chopping that and move on bro. You are missing out on something key though or as i said your nutrient uptake is out of wack. If you ever wanna talk turkey there is loads of ppl on here who would know a lot more than I. But hey, it never hurts to bounce stuff off each other so ye, if you wanna chat about what I said if you are seeing wet soil. Like a plant should more or less be clearing up and drying out completely in 2 days even with 2L of water you should be seeing nearly dry soil after 2 days. But as for that plant. She's done man. Take it down a trim and smoke it up. Good luck man