Yeah no wonder.
You've got a lightning fast grow.
2 foot high red sparks if I'm not mistaken....
UPDATE DAY 019
Another curiosity has appeared on one of my plants :

And I am totally clueless to what it is.
You can see in the full version that this part of the leave is not only deformed but also different in color, because that part is dry.
And as promised a comparison.
See here 'best of this grow' versus 'best of my previous grow' both on day 19:

The round pots I use now are just as wide as the square pots of the last grow.
Big difference! I'm getting optimistic!