A little help please...

I have 4 photos just starting 6th week of flower. GG#4, White Widow, Grandaddy Purple and a Wedding cake. All doing well but GG#4 showing a deficiency on some of her leaves. All four, same environment and feeding. anyone have any thoughts? See pics...

A few leaves showing a lighter green and a tad twisted.
All in 3 gallon pots, coco with 20% perlite, Gaia Green dry amendments, Crecer Lighting PanthrX Mini.

Aww too bad mr4tune isn't here, he knows everything. I would say he's probably a wizard.

Do you think he may pop by?

is it a purple strain or do i spy a magnesium def. cal mag might be an idea just from the purple stems

It’s the Gorilla Glue #4. I do add 3-5 ml of calmag per gallon every watering. None of the others seems to have the issue.

gg#4 seed?

From seed? Yes... Blimburn Seeds to be precise.