We have discovered that some improper configured network devices can cause the connection to 1.1.1.1 via DNS-over-HTTPS (DoH) to fail. If you could not connect to api.telegram.org while we working on a fix, you can turn off DoH temporarily.
我们发现有部分网络运营商错误的占用了1.1.1.1作为内部地址，这将会导致DNS Over Https服务发生错误。我们正在尽力解决这个问题，如果发生无法连接api.telegram.org的问题时，请尝试关掉DNS Over Https选项。
link： https://blog.cloudflare.com/fixing-reachability-to-1-1-1-1-globally/
