Is that 1 big pot? Yeah just asking a bit much for one pot, at that size of canopy, if you have your metric dialed in she is probably running out of the ability to protect herself and photosynthesis due to running out of water all the time. This creates bad ec spikes from the resulting drought on a daily basis, water flow ceases/ greatly disturbed and causes massive loss of energetic efficiency.
Need a pot alot bigger and more buffer, she doesn't have enough metabolic runway with which to work with each day, you are asking more than her gas tank of water will allow, destroying the electron transport chain.
Defo looks hungry and starved, looks like she has started senescence protocols too early, this might be from a actual defiency but the ec spikes will also destroy bulk flow and water uptake which prevents uptake and triggers self cannabilaztion.
Gluck. Bigger pot next grow or either tone down intensity of the environment.