chrisl your responses as well as other Cox employees are really aggravating. gfresha DO NOT dispatch someone to you and pay the $75. There are 1,000s of posts about Cox & Fortnite (in these forums, fortnite forums, and reddit). Cox keeps sending people and charging $75 for this exact issue. I had someone come and my internet was "the cleanest I've ever seen" from the technician and said the issue is not on their end and left.
All I know is that it started happening about a month ago.
Speedify VPN works because it essentially gives you the direct hop to Speedify's server which is closer to the fortnite servers and have different hops between servers. I can use VPN's and get 0 packet loss, but it still feels laggy.
Just look up other ISPs in your neighborhood and leave cox if you have that option!