I've confirmed that manually setting the Junk folder to be Inbox/Junk causes spam to be moved there.
So then the bug is really "Drafts, Send, and Trash all work correctly as subcomponents of the Inbox, but the Junk folder does not".
What is different about the Junk folder?
I've confirmed that manually setting the Junk folder to be Inbox/Junk causes spam to be moved there.
So then the bug is really "Drafts, Send, and Trash all work correctly as subcomponents of the Inbox, but the Junk folder does not".
What is different about the Junk folder?