Nutrient issues can be a little hard to pin down because one can impact the other, this article explains why: https://www.gardenmyths.com/can-leaves-identify-nutrient-deficiencies/
That being said, my best guess from looking at your diary is lack of potassium (I am intentionally feeding low potassium fertilizer blend for flowering on an auto as an experiment on boosting cannabinoids) and you can look at those pictures here if you're curious:
growdiaries.com/diaries/268341-grow-journal-by-bc-green
Growing both plants in one container ends up making the two compete for resources and it can be difficult to then predict nutrient demand. I would definitely resume nutrients, especially if the issue looks worse after flushing. I would stick with the regular feeding schedule to the end. They are getting close enough and the plants look healthy enough that you should still have a very enjoyable harvest.
Hope this helps and happy growing!