Orange/brown burnt marking spots progressing

Probably have dry areas in your roots after watering. Fabric pots drain out from the sides especially after their full of roots leaving some lower areas dry in the planter. I had to give them more water which means more nutes, unfortunately, to get the entire root system saturated. Great for the nute companies but bad on the bank account. Never used them again...they were invented by the nute companies to sell more nutes. Huge waste when you see your expensive nutes pouring out the sides. Cheers