Slight case of nute-burn via watering with nute water. It is impossible to not to splash leaves if using nute water. I keep a spray bottle of regular water near the plants and spray the leaves after using nute water. Works for me.
Its a huge debate about what causes this mozaic pattern on the leaves. Some will say its a mozaic virus, but there is no proven fact that cannabis can even get any mozaic viruses. Still new findings and tests being done on what causes this. It will not harm your plant threw its entire cycle having a few mozaic leaves. I doesnt hinder growth or buds.