I think I am suffering from the same bug. For me: I only have an IMAP account (imaps), and new messages do not appear automatically. Sometimes, I can force a refresh by entering a resetting the filter, but most of the time: closing the INBOX tab, and re-opening it does the trick.
Not good, but at least it works... -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org