dude i feel ya, ive got the same damn problem on all of my plants i can't figure it out. i fed them at full strength and theyre small, so i thought it was nute burn... so i flushed, didnt work. thought it was a deficiency so i fed... didnt work, thought it was a lockout so i adjusted my pH... didnt work, maybe its overwatering? so i just let them sit.. didnt work, theyre in happy frog being fed just 6.5pH water and it's still not working. its only getting worse idk what to do. if you find an answer please let me know ive tried everything and it wont fucking go away