@siracusa I’ve been experiencing a bug on Mac/iPad/iPhone in Safari for several years where DNS doesn’t work a few times a day. It fails after a 60 second timeout on all devices and all networks from cellular to the $50k per year guaranteed zero packet loss fibre line we have at the office. Never seen it in a chromium browser. I don’t share your optimism that Apple will fix Err_Network_Changed even if it starts happening in Safari.