Cannot customize favicon.ico on Openstack dashboard

Issue

When I do the following steps I find the file is put back to the previous version after HTTPD is restarted (systemctl restart httpd)

cd /usr/share/openstack-dashboard/static/dashboard/img
mv favicon.ico favicon.ico_OLD
cp /home/heat-admin/favicon.ico .
chown root: favicon.ico
chmod 644 favicon.ico
chcon --reference=/usr/share/openstack-dashboard/static/dashboard/img/favicon.ico_OLD  /usr/share/openstack-dashboard/static/dashboard/img/favicon.ico
systemctl restart httpd

• I find that the favicon.ico file is replaced with the old one and the favicon.ico_OLD is removed.
• We have 3 controllers - I have replaced the file on all 3 before running the command to ensure the files are the same across controllers before restarting but this has not changed the behavior seen above