This seems to get ridiculous: we're all in home office and Apple can't make sure the internet connection stays stable? All I read here seems not to fix this problem and the checked solution is the sys feedback page from Apple - posted 6 months ago? I have 4 Macs and those running Big Sur have these unstable connections. The one with Catalina does not. Apple, hello? Anyone home?

This problem still exists with Xcode 12.4 !