Persistent Connectivity Issue for Specific Software (LoL, Discord) and Games

Hello,

I've been experiencing an issue for the past two days where my internet connection suddenly stopped working for specific software and games.

Although I have a stable connection (for example, I can easily install a Steam game), applications like League of Legends (LoL) or Discord start up and run extremely slowly. My PC is quite powerful, so I know it's not a hardware issue.

Furthermore, as soon as I try to launch a match in a game, it immediately disconnects me.

I already try change my dns

Any ideas on what could be causing this?

Thank you