Bugs/Issues custom fields do not sync with Zoho Reports

Bugs/Issues custom fields do not sync with Zoho Reports

Hi,

I have added a couple of custom fields to the bugs/issue tracker in Zoho Projects.  I have setup an integration between Projects and Reports and synced the data.  I didnt manage to sync the custom fields to Reports ?  With other tables like Tasks and Projects it works fine, also using custom fields.
Is there a reason that for Bugs this does not work ?
Regards,
Peter