Did you add both lime and oyster shell? I thought if using Roots soil there was enough in there? Can't get Roots over in Uk which is why I added extra oyster shell, gypsum and chicken shells. My issues with previous mixes was not enough calcium and magnesium and the aeration ratio's were off which made matters worse. Especially using LED, it strips it right out, usually see it in first week of flower but have had it as early as 2 week veg! I have epsom salts to add to my teas or foliar which can sort any Mg problems if they start.
With the auto's, I'm sure just cutting the mix a little more will work.
not sure if your still active on here but ive ordered everything to make your soil recipe up...just wondering if it went well for you!