If these were underneath growth and you just topped them or exposed them, i wouldn’t be worried. They’re at that point where rapid growth is happening and flowering changes are beginning.. sometimes you’ll see some mild deficiencies show up that shouldn’t be overreacted to IMO.
Keep an eye on it but I wouldn’t take any steps like adjusting feed just yet.. luckily you’re in coco so any adjustments made in the future to remedy any issues will take effect quickly..
Give it a few days and go from there. They’re looking good and your feed numbers seem on point for your set up and it being an auto. A lot of ppl over dose autos.