Upper leaves are yellow and not smooth

Its ok for new growth to be a bit yellow it should green up over the next few days and if it does not then it might be a sign it could use some other nutrients. Fe S are two that comes to mind but I don't think that is whats happening here, The smoothness is also a none issue to me. Give it some time and keep it happy with feed water and light. One thing to note, sometimes the nutrients are there but PH can mess with the absorption of things or bad watering habits. Its also good to get nice spacing between the nodes and if its to tight just have to back off the light a bit. I do not see any feeding regime in your diary though. They tend to need a topdressing/transplant every 3-4 weeks when grown in soils and amendments. If you're giving them liquid nutrition its best to get some runoff with it so it does not buildup in the medium and causes issues later. Might want to add this information to your diary. https://420life.com/wp-content/uploads/2021/10/Marijuana-Leaf-Deficiency-Chart-scaled.jpg This is a nice little chart for helping identifying lead issues in the plants. Good Luck!