This problem started happening recently with me. Before, when my PC started up, I could load YouTUbe instantly. Now that isn't the case anymore. What's weird is that this issue only affects download speed and not upload speed. When I am in-game in League of Legends, I am unaffected by the ethernet slow down. However, when the internet is slow and I leave game, my game client, along with my web browser are extremely slow.
https://prnt.sc/1l3xz8q On my network tabs, it seems my computer will have zero download speed for 5-10 minutes.
https://prnt.sc/1l3xz8q On my network tabs, it seems my computer will have zero download speed for 5-10 minutes.