Emails with reminder set are being unvaulted without a flag

Hi,

There is a situation:

- default policy not to proceed the items with pending reminders set

- oversized emails (> 4MB) are being vaulted during daily Archiving task processing

- some of the oversized emails have reminders set by the users

Also other emails (less than 4 MB in size) with reminders set are manually vaulted

Result: 

On the next day oversized emails appears vaulted. Unvaulting them clear the reminder.

Also manually vaulted emails are being restored with reminder cleared off.

 

Any ideas?