Misc IT Autists GTFIH: WiFi Problems

1. Wifi randomly stops working, only youtube and google search is connecting, any other apps or websites fail to connect

2. Ipconfig shows that the default gateway changed to 192.168.0.25? when it is usually 192.168.1.1

3. Visiting 192.168.0.25? sends me to some TP Link Range Extender web interface asking to set up the username and password instead of the usual Router page

Works fine now but how did this happen? I'm assuming my neighbor is setting up a device but that doesn't make sense why my gateway would suddenly change and their device would be on the same network as my devices?
https://en.wikipedia.org/wiki/American_decline
https://en.wikipedia.org/wiki/Societal_collapse#By_absorption