Today, when visiting the list and copying issues to the clipboard, and pasting them in an external tool, like a text or spreadsheet editor, issues are organized by their issue key.

When showing the child issues that can be confusing because what is pasted does not reflect what is actually seen on the list:

List showing some issues and child issues selected and copied to the clipboard:

In a spreadsheet:

Notice how in the list it shows TEST-1, TEST-2, TEST-6, TEST-17, TEST-8 and in the spreadsheet it is TEST-2, TEST-3, TEST-4, TEST-5, TEST-6, TEST-7

The suggestion is to make child issues appear under their parents when copying issues from the list, keeping the same order we see in the list.