Coco problems. Need advice. Godfather OG, Sherbert, Gorilla Chemdog, & Mac1

[jonnynobody]

I started these plants in coco but began having some leaf issues early on about 2 weeks from the seedlings cracking above the coco. The leaves on the new growth curve inward. The plant overall looks healthy and lush, but there's definitely something amiss. This is my first time trying coco and after noticing the leaf issues I transplanted almost all of them into my usual method in hempy buckets with 100% chunky perlite. I'm leaning hard toward the problem being over watering but I'm not certain so I'm hoping I can get advice from my fellow growers. The plants I transplanted haven't been in the hempy's long enough for the tap roots to reach the reservoir so I won't know for another 7 days or so if the transplant resolved the problem.

Background info:
Jack's 321 minus the epsom salt (only added in flower) @ 1.6 ec PH adjusted to 5.8
460w qb @ 25% output and 2x 110w qb's @ 50% output.
Temps 78-82
Humidity is a bit low at 34%, but it's never been an issue in 4 years.
Here are some pics:

 

[jonnynobody]

The rest:

2 small cups of romaine lettuce I did just for shits and grins. Also A nice control plant to keep in the garden for pest detection. Resin glands can be very difficult to differentiate from spider mite eggs but lettuce leaf is smooth as a baby's ass under a microscope, so if any eggs of anything show up they're very easy to identify on the lettuce.