Week: 6 Seed: Critical Auto LST Applied. What can be causing this yellow patches on newly born leaves?

Not something that I see often. Can you get runoff pH and PPM measurements? Also, what grow light are you using and how far away is it from the top of the plant?

I had a very similar looking problem, freaked out but realized i was just over watering. Let that soil get really dry or even until you see the leaves start to droop before watering.

Could also be from the nutes id flush the plant next watering with 7.0 ph water only. You should probably cut back on the feedings until you see improvements. I only feed every other watering at most. and id do half of what the bottle recommends per gallon of water not 1.5 liters. (Should be known i probably underfeed but i play it safe)

Lastly i see your temps are slightly high, probably ok at what your monitor says but any higher then that is no good.

Hope this helps!