During replica promotion, configure_openldap_conf updates /etc/openldap/ldap.conf.
It adds something like:

URI ldaps://<master-fqdn>
BASE <suffix>
TLS_CACERT /etc/ipa/ca.crt

A side effect is that openldap tools (like ldapsearch) will access <master-fqdn> if the hostname is not specified in the command line.

This is a change of behavior, where before replica promotion the URI in ldap.conf was the one of the replica. With replica promotion, the URI is the one of the master