Pihole stop working at all after reboot. Can't access internet by itself

[GAS85]

Versions

• Pi-hole: 5.9
• AdminLTE: -1
• FTL: 5.14

Platform

• OS and version: Ubuntu 22.04

• Platform: Baremetal

Expected behavior

After reboot Pihole can work as expected.

Actual behavior / bug

After reboot Pihole can't update Gravity -- all connections were refused. It didn't answer to any requests, all of them were refused.
All dig commands finished with an error. If I use external DNS server, e.g. dig @8.8.8.8 google.com it was ok.
Here is debug log: https://sitnikov.eu/pastebin/J21uAtL_nIILL_Xl0boxs

Only what helped is to update netplan and add there google DNS:

network:
  version: 2
  ethernets:
    enp5s0:
      addresses:
      - "192.168.0.9/24"
      nameservers:
        addresses:
        - 192.168.0.9 # This is Pihole Server
        - 8.8.8.8     # This what I add to solve the issue.
        search:
        - fritz.box
      gateway4: 192.168.0.1

And Pihole Diagnosis is full of following error:

2024-03-01 23:12:06	DNSMASQ_WARN	Warning in dnsmasq core:

ignoring nameserver 192.168.0.9 - local interface

Check out [our documentation](https://docs.pi-hole.net/ftldns/dnsmasq_warn/) for further information.

Steps to reproduce

Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Debug Token

• URL: https://tricorder.pi-hole.net/sOiMA8ls/

Screenshots

[GAS85]

IDK why it was broken, but basically I tires pihole -r, but repair fails with an error Unable to reset /var/www/html/admin, exiting installer. This was "expected" as I do use my own webserver.
However I run it again and select "reconfigure" goes over wizard with no changes done, all defaults and pihole seems working again. From this point of view Ticket could be closed, however if you still have time to check logs to understand why it happens and how to avoid it. I will appreciate it. 🍺

[github-actions]

This issue is stale because it has been open 30 days with no activity. Please comment or update this issue or it will be closed in 5 days.

[GAS85]

Still valid.

[github-actions]

This issue is stale because it has been open 30 days with no activity. Please comment or update this issue or it will be closed in 5 days.