Any ideas on what's wrong?

about a week ago i noticed one of my plants had these markings on its leaves,plant overall looks ok.
using amended promix, Gaia green 444 plus neem,oyster shell flour, crushed oyster shel, dolomite lime, ewc, kelp and insect frass. Top dressed with power bloom/ewc at 2 weeks. Here's some pics of the affected leaves, also a pic of full plant
sorry about the shitty pics

oh and the leaves that are affected are closer to the top of the plant. Also was starting to get a little lighter green on the top along with a couple of my other smaller plants So i put in a little bit of 444 with my usual power bloom top dress, but this problem had already reared its head. Hoping the top dress helps, had the same problem with one of my bigger plants a few weeks ago so i did the same thing with the 444/power bloom and it stopped yellowing near the top but got a slight K def after, but it didn't last long, only affected a couple leaves and is doing great now.

Potassium deficiency.