Zoho Books/Financial Suite and Zoho CRM Integration

Zoho Books/Financial Suite and Zoho CRM Integration

I have the Zoho Financial Suite integration turn on in Zoho CRM.  Things like products, and client information seem to be syncing on their own just fine.  However I noticed that when an Invoice or Estimate is created in Books it doesn't seem to show up in CRM on its own unless I click the sync icon on the CRM Account screen.  Is this normal behavior or should Invoices/Estimates be showing up on their own?