Spaced Out 2 said:Mine do this too sometimes, I have not given them any added nutes since they sprouted. Sometimes the leaves do strange things like twist upside down or curl like what's shown in your pic but they always recover after a day.
Mine are grown indoors under T5 lights and have grown into it once which caused some problems for the upper leaves, after raising the light up there was no more problems. Hopefully yours will work themselves out!