2xGorilla Cookies andd 2xKosher Cacke in an wired setup :)

More LST and more food. Pots seems dry at top, feels light, that gotta be good sign. Everyone getting usual dosage of 0.5l with mix of vega and rizho. Im inspecting them very closely for signs of over-dosage or any other symptoms, but the seems more than fine and reacts very well as growth is steady. They are getting bushier day by day. 3 days later - repeat the same procedure with watering and food. No signs of nothing suspicious whatsoever. Only little one brown on one of big fan leaves on KC 1 due to mechanical issue. 2 days later watching them on camera I notice drop in all of the leafs. Sign they are thirsty, I think. At the next day things start to get wired again. On the biggest plant of 4, Kosher Cake 1 some of the leaves are getting sick. WTF was the first thing that crossed my mind. What is this, not again, what to do, how?!? So many questions. After little examination on all of them I was found same marks on the other Cacke, but still in very early stage. Gorilla 1 is clean, absolutely nothing, Gorilla 2 getting light green, leaves. It must be the shade, I think, as they are getting bushier. But what to do with the others? I decided to give recommended cal-mag dosage for just in case. What are these things? Anyone?