Dear Maintainer,

As shown in:
https://lists.debian.org/debian-user/2017/10/msg00640.html

Can't change Ethernet 802.1x password through gnome-control-center - Wired
Settings - Wired - Security - 802.1x.

When trying the change through gnome-control-center, when going back password
is the previous one.

The only method is to disable security completely and enable it again and
define all security options back again.

-

If manually trying with another tool, such as nm-connection-editor from
termional the change works.

This applies to debian stable version, haven't tried other versions.