What’s going on here ?

is that water have nutes in it? don't get water on leaves, it can burn holes and other bad stuff. even if no paper towel near by, at least use your finger and thumb to wipe it off gently. if you've been feeding, stop immediately. soil has nutes, seed has energy packed for 2 weeks, so you shouldn't have to fertilize for a while between those two factors. if you have, it is likely the cause. Other things to check -- what pH do you put into it when irrigating or fertilizing? if you don't know, start checking until you see that it is consistent.. make sure you are 6.5-6.8 or so for soil - helps with nitro uptake that soil doesn't provide as easily as hydroponics setups -- that and other reasons like it is why they suggest what they sugges... then of course, let plant dictate from there. pH is important. it can cause any and all deficiency and toxicity symptoms. so, rule out anything i said with recent behaviour and go from there... likely just normal irrigations with water pH'd properly and stay out of the plants way.

Hello 👋, Just a couple things i see that might help. Can you protect from the night temp a bit? 20 degree difference is a little much..if you can cover them in the evening with something or a blanket that might help. As for the mysterious muncher... do you have neem oil, or hydrogen peroxide, or doctor bonners soap? They usually can be found at any grocery store, or the garden store(neem). If you can make a 1 to 4 ratio of Dr Bonner's and water that's a good general bug killer, and all 3 can kill a variety of bugs without hurting the plants. Maybe just start with spraying the soil every few days, and you could gently spray the plant too. I did have a problem in the past from misting my plants with water that i didn't let sit out for a few hours to let the chlorine evaporate out and that ended up giving my plants a whole lot of spots and discoloration. If you're misting often be mindful of that. You can also plant companion plants with outdoor to attract plants to that instead or to ward them off. Basil, lavender, garlic etc.. Good luck with the grow, outdoors definitely has it's challenges. ✌️