Alerts don't send notification emails if vm hardware has been reconfigured.
After conversation with Dave Johnson I change the status to verified and I'm going to open a separate BZ for undocumented behavior.
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://rhn.redhat.com/errata/RHSA-2016-2839.html