It's fine. There's nothing you can do about mutations, so you just have to live with them. The plant looks healthy otherwise 👍
One of my current plants has a mutation which I'm 99% sure is a "whorled phyllotaxy". I've had this before and it looks cool but it's a bugger as it means a whole lot more trimming. Fml 😂
Yes, this is normal for plants. It's just genetics, don't worry man
I grow my own Green Gelato by RQS. And I had the same in the first row of leaves.
Rather, it's just not fully formed sheet in a fan