That’s very normal late in the budding stage and as the buds mature they pull all the energy out of the remaining leaves as the plant is nearing death! I wouldn’t worry! Just do some defoliation and get ready for your flush! You got no worries 😉
Hi @Resin_Randy they seem to me to be PH variations but mainly it is a lack of calcium, you will have to apply some source of calcium, add some calmag product in corrective mode. good luck mate 👍