It appears that the link is made by the issue key, so that the cloned issue will not have the "Mentioned in" banner indicating the Confluence page, but it will have a link to the original issue though.
But you can mention the cloned issue in the Confluence page, and it will be added to the cloned issue as well.
I’m a designer on the Jira team. For a long time, I’ve fielded questions from other designers about how they should be using Jira Software with their design team. I’ve also heard feedback from other ...
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