[openstack-ansible] Keystone federation with OpenID needs shibboleth

Hi All, I'm trying to make keystone federation with openid connect work on an Ubuntu 20.04 + Victoria cloud deployed with OSA. Despite the fact that I use openid, shibboleth seems to be involved and I had to add "ShibCompatValidUser On" directive to the file "/etc/apache2/conf-available/shib.conf", by hand in the keystone lxc container, in order to successfully authenticate ("valid user: granted" an not "valid user: denied" in apache log file). Has anyone already experienced this use case ? Thanks and best regards, Jean-Francois