kickPlayer does not take effect immediately

Expected behavior

java
@Override
public void onDisable()
{
for (World world : Bukkit.getWorlds())
{
for (Player player : world.getPlayers())
{
player.kickPlayer("Server closed");
}
Bukkit.unloadWorld(world, false); //return true
}
}

Observed/Actual behavior

java
@Override
public void onDisable()
{
for (World world : Bukkit.getWorlds())
{
for (Player player : world.getPlayers())
{
player.kickPlayer("Server closed");
}
Bukkit.unloadWorld(world, false); //return false
}
}

Steps/models to reproduce

void

Plugin and Datapack List

void

Paper version

This server is running Paper version 26.2-84-main@26e81c4 (2026-07-26T18:11:33Z) (Implementing API version 26.2.build.84-stable)
You are 3 version(s) behind

Other

After kickPlayer is called, the player is not immediately removed from the player list within the same tick. As a result, the world cannot be directly unloaded within that same tick in the plugin. The player list update occurs at the end of the server tick, which is after Bukkit.unloadWorld is executed

Start by tracing Bukkit's kickPlayer and Bukkit.unloadWorld calls through the server tick lifecycle described in the report, focusing on when the player list is updated. Reproduce the same-tick shutdown sequence and verify that kicking players allows the world unload to succeed immediately without waiting for the end of the tick.