Hey mate!
I would say that they have a light nutrient burn! Give them only water with a good pH for the next feed, maybe 3 or 4 feed with only water, this because they have a salt build up in the soil of the excessive nutrients and you need to flush do get rid of that extra nuts that the soil have, and keep and eye on them! After that I would give some nutrients but a 1/3 of the dose of the nutrient chart, and increase gradually.
Wish it helps mate !