That old damage won't heal. The twisted growth could be more than 1 possibility. Oscillating pH would cause varying growth rates which results in wavy leaves. Did you spray something on this plant? Foliar sprays are fine for a specific reason but if it's a foliar feed, that's akin to masturbation and should only be done to deliver specific nutrients to an area having an immediately problem to justify it, otherwise, use the roots for nutrient provision. That's their evolutionary function. Clogging up stomata should only be done in the case of pending catastrophe.
Tiny plant, big pot is a another problem. Makes irrigating properly difficult. Your description of your irrigation procedures is worrisome, too. light mix has a very low nutrient charge to start, so it's basically a soilless context...
1) fully saturate with 10% runoff -- not possible with tiny plant big pot. For a soilles medium you fertilizer every time with a 600-750 ppm well-balanced, complete diet. Do not count tap water ppm.. that's just from fertilizer.
2) wait for appropriate dryback and repeat.
You don't choose the volume off the top of your head or what makes you feel good. You give what is necessary to accomplish step 1. If you re-irrigate at same loss of weight, it'll take a similar volume of water - learned in hindsight.
in a huge pot, you have to water a smaller circle around the plant, but make sure that water goes all they way down. Otherwise you train superficial, shitty roots. It's a myth that potting up hinders growth or shocks a plant. If potting up shocks a plant, you should find a new hobby. Even with autoflowers, you should use size-appropriate pots so you can water properly and the rootball develops better through this process, too.
transplants outside are incredibly stressful because it involves cutting through the root system -- that's where that often-repeated falsehood originates, but indoors is a matter of gently placing plant into larger pot. That should not stress a plant. Don't man-handle the rootball like a catholic priest molesting a choir boy and you'll be okay. proper roots and a little moisture will hold it together through the process.