The artboards won’t retain the names you assign to them. They appear correct at first, but the names don’t always stick—when you reopen the document, they can revert to “copy” instead of the assigned name.

Also, in the file I’m currently working on, there are two artboards labeled “22.”

This has been an ongoing issue for years! This does not seem like it would be a difficult issue to fix, so why does it continue?