Following steps in
https://gist.github.com/dgdavid/3bb1999ea63ebf60e28340b083ab8ba8 and using
profile https://gist.github.com/dgdavid/eeb157908dc72791408ec7ef0e6f6120 I
noticed similar problem that we already faced in other products when changing
default interface.

- Load the profile in Autoinstallation
- Click on Edit
- Add custom interface eth0
- Click on Zones
- Select any other zone different from default
- Click Set As Default
- Go back to Interfaces and click on Change Zone
- Assign the interface to default and click OK

The visual result is that the interface disappears from the UI and the expected
result is that the interface stays in the UI and would have changed assignation
in Zones to the corresponding to default.