m0useanswered grow question a year ago I'd reference the feed chat and confirm your giving the right amounts. The plants look amazing in the previous weeks so this is probably not the main issue,
https://www.terraaquatica.com/wp-content/uploads/2022/01/TriPart.pdf
If using liquid nutrients in soil it is advised you get some runoff, hopefully your soil has a good amount of perlite in it to facilitate the runoff needed and not over saturate the medium.
I have a feeling this might be a buildup in the medium causing some lockout or a PH flux. You want to get a good amount of runoff about 10-20% of the pots volume. If this has not been happening then you want to start this.
it would also be good to check the runoff EC once and a while and well as its PH, with soil based grows I like to aim for 6.4PH as the microbes in the soil can fluctuate things a lot. going down towards 6.0 I have found more issues and less buffer room for error. If the runoff EC is high it means your feeding to much for its current stage of life. EG if your feeding at 1.6EC and its coming out at 1.6EC or higher its to much, it should be using some of that nutrient solution up and lowering by a few points.
Best of Luck!