You're referring to a very specific and interesting topic: dealing with a tough client in the context of Eaglercraft, a popular Minecraft server. For those who might not be familiar, Eaglercraft is a well-known platform that allows players to enjoy Minecraft in a more accessible and often more creative environment. The server version you're mentioning, 1.12.2, is a specific iteration of Minecraft that many players and server administrators prefer for its balance of features and stability.