Safari hangs on some websites

Ever since upgrading to Monterey 12.2 beta, Safari will hang up trying to access google.com. This worked ok until the upgrade. Right now it's sat there for 10 minutes, and still hasn't accessed it. By contrast, when I use firefox it finds that website instantly. Any suggestions about debugging this, apart from the "sledgehammer approach" of deleting all cookies and history (which is lame to say the least).

Safari hangs on some websites
 
 
Q