Note8 AT&T Security Update WiFi issues

I downloaded the new security update onto my phone this past Thursday. Immediately afterwards, my internet slowed down. Figured it was area. Now that I am back home, when my phone is on, the WiFi gets choked to a crawl. When I turns it off, internet goes back to normal. It is clear something has happened since the update to make my phone do this to any and all internet it connects to. Anyone else having this issue?