Check your network for unwanted traffic. You could have a residential proxy running on some device. Including almost any LG TV.
https://krebsonsecurity.com/2026/07/lg-to-ban-residential-pr...
https://krebsonsecurity.com/2026/07/lg-to-ban-residential-pr...
My ISP occasionally gives me a new IP upon router reboot and sometimes it improves briefly and sometimes it gets much worse, I think maybe nearby IPs or my ISP in general must have lower than average reputation.