Hey, everybody!
I had this problem and I’m just crazy to find a solution.
The developers can’t answer because the problem in my case was on the side of my laptop.
So, I’m using a Lenovo laptop on which the Lenovo Vantage system application is installed.
So if inside this application the Network Boost checkbox is enabled in the right corner, you will have problems with internet speed when you open Unreal Engine.
Just disable it and everything will be fine.
I hope I was able to help you because I spent a lot of time and nerves to find this answer.
If you have a different brand of laptop you may have a similar feature enabled.
Good luck everyone!
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