https://github.com/ManageIQ/manageiq/pull/15860
I'm able to set ownership on more than 100 VMs at a time , but I ran into this issue in 5.7.4. https://bugzilla.redhat.com/show_bug.cgi?id=1492895 Marking this BZ as verified.
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/RHSA-2017:3484