Just like the sibling poster replied, it is not the issue of "no Internet". You have three cases here: 1. Working internet connection 2. Slow internet connecti

Just like the sibling poster replied, it is not the issue of "no Internet". You have three cases here: 1. Working internet connection 2. Slow internet connection 3. No internet connection Everything works fine in 1 and 3, but breaks the OS when in 2 (and it is very common, just walk further from your router and you'll notice it - e.g. when waking up the mac from sleep). What is strange to me is that I had an old Macbook Air with latest pre-BigSur macos, bought a new Macbook Air (early 2020) with the same OS and I saw the problem only on it - at first I thought it was broken.