3 week old plants. What are these spots

Hi. This is my first post and my first time growing. I hope to get something from this but if they all die this go around it was good practice. So far everything looks good except two of the plants that have these spots. I can’t determine if it’s pest or not. It started happening before I transitioned to bigger pots and moved them out to my shed/grow room. So whatever caused it caused it while they were starting to grow in my closet of my house. I also just started giving them nutrients about a week ago. Thanks for any help or advice

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