I have created a number of scrum projects and I'm finding that users who are not members of the jira-software-users group cannot view the default boards. These are users who are in either jira-core-users or jira-servicedesk-users groups. They all have the browse permission on the scrum projects so they can go to the projects and see the issues, just not the boards. I've also checked the share settings on the filters for the boards. They are set up to be shared with anyone who has browse permission for the project.
Any idea what might be going on?