I'm not pretty sure if it is related to Mojang's API or AFD(Azure Front Door). However, I think it is a fact that using the API is hard in South Korea due to this strange bug right now.

Since a few days ago, some users living in South Korea noticed that some endpoints that use AFD service to distribute the static contents (eg; textures.minecraft.net, sessionserver.mojang.com) are timed out or refusing their connection for uncertain reasons.

For example, If I open a connection which set with `Connection: keep-alive` in the header, the endpoints would reset the connection after dozens of seconds according to the TCP Keep-Alive mechanism. It's okay up to here.

But oddly, The subsequent connection will get ACK and RST flags from AFD immediately; Consequently, the browser will display `connection reset by peer`.

As I know, this happens only occurs in the Korea region; Because sending the request to the AFD IP address that has located in Japan directly was no problem.