Is there something wrong with my plant ?

i would lay off on nutes for an irrigation or 3... just based on what i see in 1/2 the diariers using biobizz, AN, FF, ... list goes on. they can get you through in some shape or form.. typically require multiple other products and still constantly run into lockout and pH issues. any hint of fade, and ignore what i say. if it worsens and ends up being a true calcium or magnesium deficiency, you can amend your soild with some garden lime to start a grow and many other options. find a 2 or 3-part system that is all-inclusive - npg, secondary, trace elements etc... keep it simple. no cartoons on labels. no marketing to teenagers.