Who knows what’s going on here!

i think you need a few days of less light intensity on thes plants... on top of the spots. But, there's a chance a lot of that clears up with a little less light. The nodes appear in teh pictures as if they are stacked very tightly on top of each other. this is stressful for the plant and no internode length is detrimental long-term to the health as things will get congested quickly and ripe for infection. secondly, what are your watering habits... a big pot and smallish plant can require some deviation from standard practices, but you still want to ensure when you water the column you saturate arond the plant is fully saturated all the way to the bottom of the pot. Otherwise you will cause a greater proportion of superficial roots and potentially dry pockets that get minerals, dry out, then stay dry before more minerals are deposited then stays dry and causes a concentration gradient that can potentially grow to a real problem that you see in the plant. so... water a bit larger than canopy with a big pot / small plant context, but make sure it gets wet all the way down. it'll pay dividends later with vastly improved growth, too. Optical illusion? look at plant from side.. if all the leaves are popping out of seemingly 1 spot with virtually no distance betwen on stem, then it's getting way too much light relative to age of plant... it may crave more once you back off a bit, so you have to observe and react... the internode length (distance between 2 growth nodes) is how you determine how much right to give the plant... use it to dial it in. what i'd predict -- you back off light and within 2-3 days you'll see a vastly increased growth rate.. these initial nodes will remain tightly packed but may put a bit of space between themselves... new node growth and internode development is what you'll want to focus on, not these first 3 for determining intensity of light... you'll have to amp it up again once it starts showing proper daily growth.