certmap.conf customisations are lost during update of 389-ds-base or redhat-ds-base

Issue

• certmap.conf is overwritten during update of redhat-ds-base (RHDS8), no .rpmsave backup. We believe this shouldn't be the case. We keep specific certificate settings in certmap.conf.
• I had a custom certmap.conf as part of a pki-core install and after upgrading it was reverted to a standard certmap.conf.