Isn't this possibly caused by fix in subscription-manager. There is fix to prevent accidental removal of default productid files. Moving to subscription-manager.
Please return it back to redhat-release in case my theory is wrong.
As of changes to address bug 1526622, subscription-manager should no longer remove a certificate in /etc/pki/product-default .
*** This bug has been marked as a duplicate of bug 1526622 ***