It seems like the Moon faucets might be mining with your CPU without your approval or knowledge. My antivirus is constantly blocking against it which caused the website to not load properly.
I noticed the same thing as well, when running the faucets on brave browser, my cpu goes crazy and I sometimes have alerts from windows defender.
I never activated the minning bonus, but possibly minning is used anyway..
Although, since yesterday moon faucets are really slow, I can't even claim from moonbitcoin.cash and moondash.co.in, I will loose my 100% daily loyalty bonus
moonfaucets works well for me, may be it comes from another faucet you use ?