Slight nute burn , check runoff . Compare PPM of what you put in and what comes out.
For this , just water only ( no nutes ) up to around 20% runoff , check PPM. If it comes out too high , just give a flush and let plant stabilize with out feed until going dry again ( probably (3-4 days ). Each plant is different and it doesn't mean shit even if from same mother. Each will respond differently to the same feeding , same lighting , medium etc.
Your strains will need to be handled separately , feed requirements , supplements, and sometimes water PH. BELIEVE IT OR NOT SOMETHING AS SIMPLE AS WATER PH will change how the plant up takes what it wants.
The " safest " range for me is 5.9 - 6.2 , try changing the PH ( when watering only ) .
When I dropped my normal 6.5 range , to 6.0 , I noticed perky leaves ( uplift. ) so I ZEROED in closer to the above PH.