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That's bizarre. I've never seen munch marks in a pattern like that. Have you looked down into the crown/tip to look for a critter? Probably. Did this happen inside or out? Good looking plant otherwise...
It was outdoors until a month or so ago & it didn't have those marks before I brought it inside. Even before I brought it inside, I treated it with Horticulture Oil - in fact all my plants were treated with it before being brought inside (including the soil). I did look inside the crown and didn't see any type of insect, but even so, I dripped a little Safer insect killer inside it just to be safe LOL I have 2 new leaves that came up, but they are only like 2 inches long and they don't have munch marks yet. I guess I will keep an eye on them and see if it happens to them, too, then go from there.
I haven't seen any kinds of marks like this before, either. Whatever critter did this, and I assume it was a critter, is pretty talented LOL
From the way the marks are in a similar place and similar shape on multiple leaves, it looks to me like some damage that was done before the leaves emerged--maybe there was something in there that took a little chunk out, or it was just a growth defect of some sort. Then as the leaves emerged, it ends up looking like something's been chewing on a bunch of them. I'd just keep an eye out and see if you notice more of it, and if you don't then it's probably nothing to worry about.