Calcium lockout on both and pH issues that led to it, that's my wild guess ...
Let them dry out totally before watering next. Give one 75% amount of usual water for each with pH 6,3 no feed !!! , let it dry out !!! And in next watering add 1ml/l CalMag , no other additive except BioHeaven if you have, max 2ml/l. Again 6.3 water. Follow normal feed schedule after.
They are big girls, most prob you underfed them . I personally struggle as well a bit with BioBizz calmag,in this line I had better results without it than with.... To me all issues looks like starts after usage, but maybe I start to use it too late personally ....
All the Best !
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