Feeding every watering may be overfeeding them imo. There should be sufficient nutrients in the grow medium the way you are feeding. Plants will only take what they need - the rest goes to waste.
Consider giving them a break from the nutes for a few days while you adjust the PH.
Overwatering and overfeeding are two of the most common problems found in growing cannabis.
That’s what I have started doing. Has to be a PH issue in addition to over feeding. At least I’m getting rid of some of those FF bottles.
Many thanks for the help.