Android Health Warning DNS – Confused

Hey everyone, I am confused because of an Health Warning Error Message in the Tailscale App.
“DNS unavailable
Tailscale cant reach the configured DNS servers. Internet Connectivity may be affected”

I have Tailscale currently running on 3 devices

  • My Home PC (Linux)
  • a Raspberry Pi 4, in the same Network as the PC
  • a Pixel 7 Pro running Android 14

On the Pi I have installed Pihole.
I do have no real Problem using the Internet on the Pc and Android, and Queries from both Devices show up in the Logs for Pihole.

So i am thinking everything works fine, but that Error Message makes me a bit uneasy.

An Opinion on this would be great.
Tell me if i need to share more Info.