What is the problem?

Same question four times? Developing cal/mag deficiency. Also, you are using bloom fertilizers for the veg cycle....... which is incorrect and probably the root cause of all your isues.

Brown blotches or spots on plant leaves can indicate a variety of issues, including fungal or bacterial infections, nutrient deficiencies, or environmental problems, and require careful observation to distinguish. If I had to choose nutrient id say phosphorus deficient, brown spots less yellowing. Mobile. But I don't see a darkening of lower leaves. Ionic nutrients are easily accessible to roots and can work as a rapid remedy. Due to their structure, plant roots can absorb them immediately, meaning you can return your plant to good health quickly. Or for quick remedy Foliar sprays are great for treating deficiencies, as they act fast and damage neither the soil nor the roots. They are applied directly to the leaves, where they are absorbed through tiny pores known as stomata. Results can be visible within as little as 48 hours from application. Phosphorus-rich foliar sprays can include the likes of synthetic phosphorus, or, for an organic option, fish extract. Before you do anything get a pH of your substrate, if falls below 6.0 or rises above 7.0, then your plant’s roots are going to have a tough time absorbing ample amounts of phosphorus. If you spot a deficiency, measure your soil or runoff with a pH meter. If it’s outside of this range, then treat it with a pH up/down solution. These can be bought, or made from acidic/alkaline ingredients. Then, simply water your substrate with the appropriate solution until the runoff measures within the correct pH range.