According to our records, this should be resolved by openstack-tripleo-heat-templates-9.3.1-0.20190513171752.el7ost.  This build is available now.

openstack-tripleo-heat-templates-9.3.1-0.20190513171765.el7ost.noarch

[root@controller-1 heat-admin]# docker ps --filter name=_cron --format "{{.Names}}"
panko_api_cron
heat_api_cron
cinder_api_cron
logrotate_crond
nova_api_cron
keystone_cron

[root@controller-1 heat-admin]# docker ps | grep panko
779761334f12        192.168.24.1:8787/rhosp14/openstack-panko-api:2019-10-03.1                    "kolla_start"            5 days ago          Up 5 days (healthy)                       panko_api
50c5e97b9152        192.168.24.1:8787/rhosp14/openstack-panko-api:2019-10-03.1                    "kolla_start"            5 days ago          Up 5 days                                 panko_api_cron

We have panko_api_cron container healthy and running.

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-2019:3745