JIRA User that has exactly the same permission as another user on the project cannot see the backlog or the Active sprint. They can only see a long list of all issues.
I have added them with same permissions to JIRA.
I have added them with same permission as the other on Project.
I have checked everything and I cannot work out why 2 users with the same permission added to the project have a different view to the other users from the same client with the same permissions.