Looks like you had a strong nitrogen toxicity, but you dialed that back. Coco tends to hold a lot of residual calmag also. My suggestion is to drop the micro and calmag for the next few feeds and see how she responds. If the coco is holding a lot of residual salts, it may continue to get worse for a few days before the spread stops.
Make sure you're testing the pH and EC in the runoff as well. A high EC in your runoff would indicate that the medium was too hot and pulling back the micro and calmag is the right move.
Good luck!