When a user schedules a report to run, the schedule record contains the user's ID, but not the group's ID. When the report actually runs, the group that is used to run the report is based on the last group the user logged in as (as noted above). Not only does this label that saved report with a potentially different group each time, but the saved report's content is based on the group's RBAC filters, so that means each report might have different content.
PR: https://github.com/ManageIQ/manageiq/pull/5681 Trello: https://trello.com/c/B7jTan2r
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2016:1348