Text of mail hidden if sent via iNotes with attachment

I have discovered that when sending a mail through iNotes with attachement to other Domino users the mail is delivered with text hidden (you can see it through doc properties). Attachment is shown only. I have spotted the same behaviour on 8.5 server. But 8.5.2 version is fine.Is there anybody who faced the same troubles? There is a workarround that can overcame this?