My 2 rusty pennies? Praying leaves is a genetics expression.. Just like everything else we are seeing the plant do. Some do it, some don't. Some are triggered by light, some triggered by environment. Some by both, lol. I also think that the amount of foliage factors in.. It would take a lot of the plants energy to keep a bush shaped plant praying. I think the droopy leaves is a result of light exhaustion. Yes, autos can be grown under 24/0. But the auto gene just means that it doesn't need a light change to flower. It doesn't mean that it's no longer a plant that needs to photosynthesize. Plants rest and change food into energy during dark hours.. Autos are constantly working under 24-0.. At some point they will reach their workload and need to rest.. It's still a plant, lol. It may take a week or two for it to snap out of it, but it should be fine.. Your plant looks healthy, that's what's important. Every living thing needs to rest at some point, lol.. They say science is unsure about fish sleeping, but plants, science is sure of. Circadian rhythms are real, and are related to sleep/rest. So in short, can you grow autos under 24-0 ? Hells yes, lol.. Will you see your plant resting at some point? Most likely a hells yes, lol.