In the video by mistake, the last pruning was done by cutting the fourth knot, however all were left with their cut to the third knot :)
Happy growth!๐
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.