The Bug:

Dead players in LAN environments remain in the world when the host leaves.

Please note that this issue can only be reproduced in LAN worlds and not servers. If dead players were to click the "Respawn" button after the host had left, only then would they be disconnected from the world.

Steps to Reproduce:

1. Get two players and label them "Player A" and "Player B".
2. Get "Player A" to join a singleplayer world and open it to LAN.
3. Get "Player B" to join the LAN world and run "/kill".
4. Get "Player B" to remain on the death screen and get "Player A" (the host) to leave the world.
5. Take note as to whether or not "Player B" (dead players) remain in the world when the host leaves.

Observed Behavior:

Dead players in LAN environments remain in the world when the host leaves.

Expected Behavior:

Dead players in LAN environments would not remain in the world when the host leaves. Instead, dead players should immediately be sent back to the multiplayer menu upon the host leaving the LAN world.