I also ran into this issue with both the bullseye and buster installer. May I suggest an automatic fallback to manual configuration after DHCP failure?
- Bug#887656: Non-obvious way to set static IPv4 address Peter Roozemaal
- Bug#887656: Non-obvious way to set static IPv4 addres... Holger Wansing
- Bug#887656: Non-obvious way to set static IPv4 ad... Peter Roozemaal
