Fresh install nextcloudpi from image static ip broken

After installation I attempt to use the web interface to set static IP on local network. After reboot system always defaults to the previous dynamic ip issued by router.

I tried to set reserved dhcp in my router but nc ignores that, too

I realize nc it folks want to simplify to the least common denominator, but some of us who have been on the command line for decades would prefer a simple edit or at least some way to adjust settings on the web gui. The existing one does not work for me.