Storkanswered grow question a year ago What is your humidity? Look to me like high temperature with low humidity, Or could be the temp of the water you are watering the plant, This twist can also be because of incorrect PH.
But you only have the twist on the young ones so I will say is because of light, They are not used to the light because they are young they will get used to it when they grow a little,
I bet this happens after you do the LST and expose them to the light nothing to worry about or you can dim your light I hope this helps 🍻