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when I try to unbind the Zone and IP-Configuration from "PortA" I get the Message "Update interface failed while deleting gateway information". I can configure a different zone (ex "LAN"), but I can't use "None".
The "PortA" schould only be used for VLAN-Interfaces for different WAN-Gateways. How can I unbind the Port? It is a Virtual Appliace (Hyper-V) with Version "19.0.0-B271".
I am using v19 EAP2 on Qemu and Hyper-V and couldn't reproduce your issue. Unbinding interfaces works just fine.
As far as I know, this issue has been existing for a while and is related to hypervisor firmwares, it is not related to v19. For some reason a different interface terminology is still being used there.
I wouldn't bother with these installers anyways, just use the software (SW...) installer.
I reinstalled the system on Hyper-V with the ISO and still have the same problem. The interfaces now have a different names (Port1 & Port2), but I still can't unbind interface "Port1".