How do I avoid needing to unsubscribe and subscribe to my CRM calendar to update the Zoho Calendar?

How do I avoid needing to unsubscribe and subscribe to my CRM calendar to update the Zoho Calendar?

In order for the Standard calendar to update with my zoho CRM Calendar, I need to unsubscribe and subscribe, othewise any new entries do  not show up. 

Shouldn't the Calendar stay up to date with the subscribed calendar?

Thank You,  David Fent