Program: 57935
Project: 57935
Buggy source:
/** 
 * Send the title to a player.
 * @param player Player
 * @throws Exception
 */
@Override public void send(Player player) throws Exception {
  if (this.packetTitle != null) {
    resetTitle(player);
    Object handle=getHandle(player);
    Object connection=getField(handle.getClass(),"String_Node_Str").get(handle);
    Object[] actions=this.packetActions.getEnumConstants();
    Method sendPacket=getMethod(connection.getClass(),"String_Node_Str");
    Object packet=this.packetTitle.getConstructor(this.packetActions,this.chatBaseComponent,Integer.TYPE,Integer.TYPE,Integer.TYPE).newInstance(actions[2],null,this.fadeInTime * (this.ticks ? 1 : 20),this.stayTime * (this.ticks ? 1 : 20),this.fadeOutTime * (this.ticks ? 1 : 20));
    if (this.fadeInTime != -1 && this.fadeOutTime != -1 && this.stayTime != -1) {
      sendPacket.invoke(connection,packet);
    }
    Object serialized=getMethod(this.nmsChatSerializer,"String_Node_Str",String.class).invoke(null,"String_Node_Str" + ChatColor.translateAlternateColorCodes('&',this.getTitle()) + "String_Node_Str"+ this.titleColor.name().toLowerCase()+ "String_Node_Str");
    packet=this.packetTitle.getConstructor(this.packetActions,this.chatBaseComponent).newInstance(actions[0],serialized);
    sendPacket.invoke(connection,packet);
    if (!this.getSubtitle().isEmpty()) {
      serialized=getMethod(this.nmsChatSerializer,"String_Node_Str",String.class).invoke(null,"String_Node_Str" + ChatColor.translateAlternateColorCodes('&',this.getSubtitle()) + "String_Node_Str"+ this.subtitleColor.name().toLowerCase()+ "String_Node_Str");
      packet=this.packetTitle.getConstructor(this.packetActions,this.chatBaseComponent).newInstance(actions[1],serialized);
      sendPacket.invoke(connection,packet);
    }
  }
}

Fixed version (ground truth):
/** 
 * Send the title to a player.
 * @param player Player
 * @throws Exception
 */
@Override public void send(Player player) throws Exception {
  if (this.packetTitle != null) {
    resetTitle(player);
    Object handle=getHandle(player);
    Object connection=getField(handle.getClass(),"String_Node_Str").get(handle);
    Object[] actions=this.packetActions.getEnumConstants();
    Method sendPacket=getMethod(connection.getClass(),"String_Node_Str");
    Object packet=this.packetTitle.getConstructor(this.packetActions,this.chatBaseComponent,Integer.TYPE,Integer.TYPE,Integer.TYPE).newInstance(actions[2],null,this.fadeInTime * (this.ticks ? 1 : 20),this.stayTime * (this.ticks ? 1 : 20),this.fadeOutTime * (this.ticks ? 1 : 20));
    if (this.fadeInTime != -1 && this.fadeOutTime != -1 && this.stayTime != -1) {
      sendPacket.invoke(connection,packet);
    }
    Object serialized=getMethod(this.nmsChatSerializer,"String_Node_Str",String.class).invoke(null,"String_Node_Str" + ChatColor.translateAlternateColorCodes('&',this.getTitle()) + "String_Node_Str"+ this.titleColor.name().toLowerCase()+ '}');
    packet=this.packetTitle.getConstructor(this.packetActions,this.chatBaseComponent).newInstance(actions[0],serialized);
    sendPacket.invoke(connection,packet);
    if (!this.getSubtitle().isEmpty()) {
      serialized=getMethod(this.nmsChatSerializer,"String_Node_Str",String.class).invoke(null,"String_Node_Str" + ChatColor.translateAlternateColorCodes('&',this.getSubtitle()) + "String_Node_Str"+ this.subtitleColor.name().toLowerCase()+ '}');
      packet=this.packetTitle.getConstructor(this.packetActions,this.chatBaseComponent).newInstance(actions[1],serialized);
      sendPacket.invoke(connection,packet);
    }
  }
}