The magnesium deficiency has gotten worse, progressing all the way up the plant. But I did some PPM testing and I think I finally got to the bottom of my chronic calmag issues. Turns out I have relatively soft water at only 55-60 ppm. I discovered i need to add about 1.5 ml of calmag per watering to bring it into the desired range. So essentially my plants have been chronically getting shorted on calmag I believe which I think I finally discovered how to correct it. Hopefully it stops this from getting any more out of hand and I think it's gonna make a massive difference for my future grows.