"Conflicting UUID" by repeatedly joining server

[axionbuster]

Java 1.19.2 client (official Minecraft launcher); commit 2ee9605 (main); encrypted.

Example used is terrain.

Summary

Joining the server repeatedly can cause "Conflicting UUID" being logged to the server and kicking the user.

Often paired with Broken pipe (os error 32) (macOS 12.5.1 Monterey) and error during play: deadline has elapsed errors (but not always).

Each time "Conflicting UUID" error happens, the player count goes up by 1. You can check this by going to the server listing in the Minecraft client and hitting "Refresh." Player count is increased by 1.

Reproduction

It often happens by itself.

You can cause this reliably by quickly disconnecting while the client's screen says "Joining World."