Is there a problem?

Hi Afrom_mfk_M_A_N First i didn't understand why you a plant that size(small) under 12/12 cycle but when i saw your diary i figured out that you must putted her in the same tent as you are growing other plants that do need that cycle. Some other advice as well: (only)Autoflowers can be putted in 18+ hours for all cycles. You will benefit more with yield by putting them at least 18hours a day instead of 12. Myself and other people have done even 20-24hours of light a day with autoflowers ( personaly i like to give them some rest so i did 20hours a day) Your leafs are like that because you might have been overfeeding her, looking at your diary at your other bigger plants, they are turning and curling like that as well and have yellow burned tips even brownish. To proof this you can always flush your plants a bit and check your run-off. If it has more then 2.3-2.5 EC in it you should flush them with only ph 6.2-6.4 water. Ps, because you kind of pushed your smaller plant into flowering early, it might stretch a little bit but it will never be a big plant. Goodluck Growing