Recently the Jira UI changed quite a bit.
Now, when I open an item separately in a browser tab, the list of child items SOMETIMES does not populate.
This means I'm left thinking that, for instance, an Epic has no Stories in it.
If I refresh the browser tab, the display of the item refreshes and the list of child items is then usually populated.
Note that I am not creating child issues at this time, I am just viewing an issue that already has child issues.