Hi mate, certainly looks like you've had a few PH issues. Calmag deficiency is always the first to show up with lockout. Soil is a very forgiving plant and can handle slight fluctuations. As long as you're giving her 6-6.5 you should be all good. Maybe in your next watering you ad a tsp of gypsum to help stabilise the any ph problems. I hope this helps, good luck and happy growing.