Nute burn or lacking P?

Looks like you have a lockout from overfeeding. Your plant is having trouble taking up multiple nutrients. I see this most when plants go into flower and the grower goes too heavy on bloom nutes. Sometimes residual N in the soil will burn them when they go into bloom and need less N, but it looks like you're not using much N. It should also be noted that a bad pH can cause all of this. I believe at this stage you should be aiming for 6.5.

Hi there, Deficiency sometimes doesn’t result from lack of nutrient.It may lockout due to improper pH or abundant of other nutrient in that pH.Find out the base cause. As long as you are giving the perfect growing conditions and feeding, they will not go worse.Before you do anything, make sure your water pH, ppm(EC) and run off are in corrected range.If you are growing in soil, keep your pH around 6.0~6.5 for both of your water and run off.Also in soil,the less nutrient the better to prevent lockout.Happy Growing... ✌️

My guess is the soil is maybe a little hot, nutes and whatever it's got too much if. I'm using airpots with Natures Care organic/perlite mix. I had mixed in some worm castings and I'm getting the same problem. I've watered and checked Ph, running 6.0. Overwatering and feeding every time will do the same thing as well. My best guess is that it's not draining and drying quick enough to handle the watering frequency and nutes. My best guess.