When a title is sent to the client, and then the client disconnects whilst displaying that title. When the user logs into another server, that title persists.

Steps to reproduce

• Use the command /title @s title "bug"
• Log out while it is being displayed
• Log into another world
• Observe title still present

Code analysis

Quilt mappings 1.18.2

In the "clear" function in InGameHud, set title to null and reset the delay, like the ClearTitle packet.

public void clear() {
   this.playerListHud.clear();
   this.bossBarHud.clear();
   this.client.getToastManager().clear();
   this.client.options.debugEnabled = false;
   this.chatHud.clear(true);
   
   // add below code
   this.clearTitle();
   this.setDefaultTitleFade();
}