Thanks for reply.
I just tried uninstall AdGuard completely then reinstalled it in your way but the issue persists, I also didn't touch any option, it's all default.
No. I don't use any antivirus app or network-related app, the only one I'm using is ExpressVPN but I also tried remove it and...
Have been using AdGuard 2 years, absolutely love it!
Yesterday I finally updated to Big Sur, everything works fine but AdGuard is causing some Creative Cloud stuff running 100% CPU and the fan is blowing like crazy.
This happens as soon as I boot up my Mac, not every time but very often...