Google login on OnDemand doesn't redirect to customer portal

When trying to reach the customer portal of an instance when logged out:
https://instancename.atlassian.net/servicedesk/customer/portals
The login page is displayed.

If the user logs in with a regular existing user entering the user and password, it is redirected to the customer portals as intended.

If the user clicks the Login with Google button, he is redirected to JIRA Home Dashboard. Not the Customer Portals.

This adds confusion to the creation of Service Desk requests.