During the training one of the plants broke, however, they all look for light very well.
during the week that follows they transplant and let it grow a little more :)
I just think its signs from your HST and the transplant to the bigger pots.
And if you haven't flushed her sometime under the veg its time to do it now.
I dont think it something to worrie about but i would keep an eye on it.
Good luck.