Network/Connectivity can't remove wi-fi extender from network list

  1. V1543984526694
    Cupcake Oct 14, 2019

    V1543984526694 , Oct 14, 2019 :
    When visiting my mother, my phone automatically connects to her internet. Recently, it tries connecting to a wifi extender but can't because it doesn't have the password. It keeps disconnecting my mother's internet connection and trying to connect to it. I am unable to remove the wi-fi extender from the network list. Forget doesn't remove it. If I try forgetting it many times, the internet does finally connect to my mother's wifi and stays connected. I have tried rebooting, etc. but can't remove the wi-fi extender from the network list. My mother also has an extender in her place, but that isn't the one trying to connect. That works fine. I can only guess this is from a nearby neighbor. Suggestions would be appreciated. It has Oxygen 9.0.17.