Is that rank taste like hemp wood and greeny?
Im honestly not sure as ive not had the taste problem myself, someone told me it was from overapplication another said spraying organics on buds caused the vile taste. Most people cut its use out at end of week3, a few go to week5.
It must be the seaweed itself not the tria or brassinolide alone or id taste it in my weed as i use tri upto flush. Ive just used the brassinolide on a plant with 2 week left to try something out so il see if that picks up a taste.