Hey Man,
I can Tell ya that your pH went off at least at one time!
One of my Spray solution cracked and had a pH of 8 and something.
Try to bring your solution to pH 6-6.2 at the next feeding. That should help.
Have a peek at my Purple Haze Diary, week 4-6 of Veg anywhere there. Got exactly the same odd shoots.
Hope this helps, good luck!
Cheerz 🤘
OimRausch