This lady here has had and interesting development, after completely stopping to flower, she just got back to it and hasn't stopped still, no nutes just plain water for the last couple weeks.
Things are looking better this week. it had a slowish start. a good flush with pH 6.3 could help in short term. Back off nutrients depending on soil make up maybe till spots improve. ppm of water feed compared to run off can indicate nutrient concentrations and take up. All the best