Robertsanswered grow question 3 years ago I would not say it is a mutation. I had this before and were 2 causes. 1 was me moving plants and working on them and catching other leaves, the second was not this bad but was gnats. Not saying you have or done either. Leaves won't always be perfect. It's the final product that counts. Good luck that is my best guess from available information. 🌱