Indicate that an issue was created because it was moved | indicate than an epic was created because there was a promotion
When an issue is "moved", the original one is closed, and a new issue is created. The new issue has all the comments copied from the old issue (including timestamps). So consequently, the new issue has an open date that is later than all those previous comments.
This is the same for promoting an issue.
This may cause some confusion for people who are not aware of the change at a glance. For example, see:
Proposal to address problem
Indicate in the opened timestamp at the top of the page that it was moved or promoted. Or otherwise emphasize the system note of moving/promoting more significantly.