Hello @Seller_UUbsSkvSc41JR- and thank you for surfacing this here on the forums.

Have you already reviewed this Amazon Ads help page on copying campaigns? It does outline the steps for doing so and instructs advertisers to:

"Update the intended campaign status by unchecking Pause new campaigns after creation. By default, your campaign will be paused unless you uncheck this box. By unchecking this box, the status of the original campaign will carry over to a newly copied campaign."

So it may be this option was not unchecked if the source campaign was archived when it was copied. I hope this helps explain the experience, but if not, I can recommend creating a case with Advertising support for some campaign-specific troubleshooting!

Thanks,

Danny