A change to task in Outlook severs the 'related to' link when re-sync'd with Zoho

A change to task in Outlook severs the 'related to' link when re-sync'd with Zoho

We are using office 2007, and can replicate the problem readily.  Has anyone seen this?  Is there a fix?

It basically makes the Outlook plugin unusable for us as syncing tasks was the main feature we were interested in.