Bet you money this here was the issue for the scab like materials.
Being that your plants are so lanky and with all that extra weight at the end, when you shook them the cellular wall probably broke and the plant just needed to heal itself, Right after watering is the worst time to move or try moving stems as the cell walls are full of fresh water.
as for the leaf i wouldn't say bug bites, on closer look at the photo @BadVoodoo tagged looks like you just gave them a bit too much potassium with the burnt edges on the tips, the yellowing in the center just looks like the plant didn't respond well at one point, whether it got locked out from excess or the pH went out of balance at one point due to a possible "too strong feeding" then the plant just went a little mutant and shut down growth in the center of the leaves as they were expanding, only shows on older growth right ?
if so most likely the case.
nothing to do now just other than keeping them happy, as those spots if not bad will get darker over time as cells move back to those areas of damage, but they will be the first places you will notice pull back when the plant starts consuming itself just before its ready to harvest.
Your good, and the plant looks healthy, just need to get more light on the plants by getting things level if you can and grouping them together and getting so only those plants are lit up with the light. (smaller room ideally, but that can't wait).
Edit: Also i bet the tops feel like they want to snap with the lanky stems, but give the pinch method a try if your feeling confident.