Moving this bug to POST for triage into Satellite since the upstream issue https://projects.theforeman.org/issues/28463 has been resolved.
Verified on Satellite 6.7.3_1 using steps from problem description, all selected Ansible roles are assigned to the host regardless of per-page setting.
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 (Satellite 6.7.3 Async Bug Fix Update), 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-2020:3614