Network DNS still shows 8888 on Android

  1. I have changed DNS server to 1111 on my router (FritzBox-Cable)
  2. I have changed DNS Mode on my Android mobile to
    I just double-checked that both settings “stick”.
    Question: On the Android, when inspecting details of the network,…
  • that my Android mobile is connected to, and
  • that is established by above mentioned router,
    what could be the reason that DNS is still shown there as “”?
    Thank you in advance for any ideas…