To this end, Mojang Studios has released Minecraft: Java Edition 1.18.1 Release Candidate 2 to test a fix for world chunks occasionally not loading.

A chunk is a unit area of the vast Minecraft map. As players know, the map of the game is nearly endless - players can keep walking and the world will keep loading.

To fix Internal Exception: java.io.IOException, An existing connection was forcibly closed by the remote host Minecraft error, you need to follow the given solutions.