Droopy Leaves after Moving to Flower

I moved these three vegging plants from my 2x4 with a single "1000W" blurple. To my flower tent with three ViparSpectra X (1000 x 2) and XS (2000) Q-Boards. The humidity was low in both tents, 40%, so that has not changed, nor has the temperature (72.5F) since I always give a week of acclimation before switch.

The only major changes I've noted are the change from the blurple (which is a fantastic veg light btw) to the three high intensity boards. Additionally, I did transplant two of the three plants to 5 gal fabric from 1 gal plastic pots and did my normal root pruning.

These plants are all on a diet of GH veg (5mL/L H2O), Calmag (4,0,0 ; 1mL/L H2O) and GH micro (as needed). That has not changed. The pH is at a steady 6.0-6.4.

I'm clueless here. Thought maybe it was a deficiency or toxicity but nothing seems to match. *shrug* any ideas?

Before and after:
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