Why would plant grow 2 and 4 petal leaves?

currently have ILGM 4 White Widow Autos. They are each growing differently and all are thriving and budding nicely. But in addition to regular leaves, I am having 2 and 4 petal leaves showing up. no sign of hermie that I can tell. No light leaks. 18/6 light. Should this worry me? everything else seems ok.

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Any chance you can post a pic?