Comment # 1 on bug 1164075 from Samuel Cabrero

The problem is that "initgroups: files" has been added to our downstream
nsswitch.conf file when glibc was updated to 2.31:

https://build.opensuse.org/package/rdiff/openSUSE:Factory/glibc?linkrev=base&rev=234 

Even when it was explicitly commented out by this commit, included in
glibc-2.31 tag:

commit eed1f6fcdb0526498223ebfe95f91ef5dec2172a
Author: Carlos O'Donell <carlos@redhat.com>
Date:   Tue Oct 29 11:58:03 2019 -0400

    Comment out initgroups from example nsswitch.conf (Bug 25146)

    In commit 4b7c74179c8928d971d370e1137d202f891a4cf5 the nsswitch.conf
    file was harmonized with downstream distributions, but this change
    included adding "initgroups: files". We should not add initgroups by
    default, we can have it, but it should be commented out to allow it
    to inherit the settings for group. The problem is principally that
    downstream authconfig won't update initgroups and it will get out of
    sync with the setting for group.

Andreas, I am reassigning it to you as glibc maintainer but let me know if you
are not the right person.