Been heavy on the calcium perhaps? Mostly I see Mg with a little K. Along with some burn that makes me think lockout.
I'm never keen to blame high light. Often we see problems blamed on light, at half of what a cannabis plant can take. Mg is one of the first things that is often found limiting, and we don't really have co2 deficiency. However, if it's low, processes can't complete. Leading to burn through accumulation of unused components. We will blame high light, but is it? Here I see the edges thickening up, and can't help wondering if that's a mix of high air flow and low co2. Driven in part by the light.
Excess calcium in leaves is often from lower Ca levels. Raising Ca may slow uptake. If the water/plant is warm, and Ca low, with high levels of evaporation, we can see excess Ca uptake. Which shows in Mg and K reduction.
It's a bit mystical, so I will offer a link:
https://scienceinhydroponics.com/2019/07/calciums-behavior-in-nutrient-solutions.html
Washboard leaves. Wispy growth tips. Leaf tips veering off. Taco shapes. It's all Mg. We don't have to find stripes. Are you loosing lower leafs in an almost N like fashion?
I must say... plants are not my thing. I like scratching away at topics and do better than many. However it's tech I'm better with. Fixing grow conditions, and washing out the old for new.
Ya know, reading back, you say coco. Coco is loaded with K. I think I'm imagining a K deficiency, and it's just burn. Mg is easy to push out with excess nutes. I generally start with runoff EC when I get issues myself. It's a great gauge. I can't really go on without it.