IMAP move not notices by ZxMobile

Hi,

I use my Zimbra mailbox with iOS-devices via ActiveSync/ZxMobile, by webinterface and by IMAP with Apple Mail.
In a lot of cases it happens that I drag&drop an email via Apple Mail from the inbox to a subfolder. While the Zimbra webinterface recognizes this move and will show these mails in the correct folders, ZxMobile/iOS devices won't - The emails still appear in the inbox.

All devices are up-to-date with the latest version.

Anyone had the same problems? Is that a known bug?

Thanks in advance
Mike