Interface is not assigned to the right zone after following steps:

- Open new UI for firewalld: yast2 firewall
- Assign interface to different zone (for example public)
- In Zones, set different zone (for example trusted) as default.
- Accept
- Check with firewall-cmd interface assignation:
firewall-cmd --list-interfaces --zone=public | grep ens4 (is not there)
but firewall-cmd --list-interfaces --zone=trusted | grep ens4 (it succeeds and
it is pointing to the default zone not the one that was assigned) (same result
also after trying a firewall-cmd --reload)

Assignation works in general, but in this combination and just when the user
enters first to this screen and set previous steps, does not work (perhaps some
wrong initialization).

Expected result: Point to the interface that is assigned in the UI (in the
example, to public)