Problem is, that report templates are actually also objects, that are "tied" to specific static group (= access group) and thus have limited visibility. In case of default report templates created during installation, they are configured with access group set to group "All", which means that only user which have access to "Reports & Dashboards" on group "All" will see those reports. The same applies also for other managing objects in console (policies, dynamic groups, notifications, ...).
Unfortunately I cannot verify now, but there might be two solutions, where both do require some r