MobileNG bug with deleted mail_item (flag 128)

Hello,

Since we moved from Zimbra Mobile to MobileNG, users report that when they move or delete messages from their Mac using Apple Mail.app and IMAP, the moved / deleted messages still show on their mobile device using MobileNG ActiveSync in the same folder.
We've been investigating and found out that when a message is moved / deleted using Apple Mail.app, the EXPUNGE IMAP method is not call (unlike with ThunderBird) and the mail_item only gets a 128 flag (deleted), which MobileNG seems to ignore.

Are you aware of this behavior / bug?

Regards,
BlueBerry.