Override and change to static IPv6 on host fails

[danskvandrelaug]

I have tried to change to static IPv6 on the host, by editing the /etc/netplan/00-installer-config.yaml as described in the documentation, but the host continues to use the public served IPv6.

• Run cloudron-support --troubleshoot:

Vendor: Linode Product: Compute Instance
Linux: 6.8.0-100-generic
Ubuntu: noble 24.04
Execution environment: kvm
Processor: AMD EPYC 7713 64-Core Processor
BIOS pc-q35-7.2  CPU @ 2.0GHz x 2
RAM: 4009872KB
Disk: /dev/sda         57G
[OK]	node version is correct
[OK]	IPv6 is enabled and public IPv6 address is working
[OK]	docker is running
[OK]	docker version is correct
[OK]	MySQL is running
[OK]	netplan is good
[OK]	DNS is resolving via systemd-resolved
[OK]	unbound is running
[OK]	nginx is running
[OK]	dashboard cert is valid
[OK]	dashboard is reachable via loopback
[OK]	No pending database migrations
[OK]	Service 'mysql' is running and healthy
[OK]	Service 'postgresql' is running and healthy
[OK]	Service 'mongodb' is running and healthy
[OK]	Service 'mail' is running and healthy
[OK]	Service 'graphite' is running and healthy
[OK]	Service 'sftp' is running and healthy
[OK]	box v9.0.17 is running
[OK]	Dashboard is reachable via domain name
[WARN]	Domain danskvandrelaug.dk expiry check skipped because whois does not have this information```

What am I missing?