This is literally a one-word fix, which I would love to propose for 6.2.z
I believe the fix for http://projects.theforeman.org/issues/20260 will also resolve this issue. Assigning to the POST instead of marking as duplicate, to have this case covered by QE verification.
The fix for http://projects.theforeman.org/issues/20260 was merged for https://bugzilla.redhat.com/show_bug.cgi?id=1465628 in https://gitlab.sat.lab.tlv.redhat.com/satellite6/foreman_remote_execution/merge_requests/24
So I am moving this to MODIFIED too.
Created attachment 1319140 [details]
Verified on satellite-6.2.12-1.0.el6sat.noarch, rex job is executed just once on host collection member with several interfaces.
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.