Program: 162036
Project: 162036
Buggy source:
private void toggleKey(int keyCode,boolean isPressed){
  if (!isIgnoreInput()) {
    if (keyCode == KeyEvent.VK_Z && isAzertyCountry || keyCode == KeyEvent.VK_W && !isAzertyCountry || keyCode == KeyEvent.VK_UP) {
      up.toggle(isPressed);
    }
    if (keyCode == KeyEvent.VK_Q && isAzertyCountry || keyCode == KeyEvent.VK_A && !isAzertyCountry || keyCode == KeyEvent.VK_LEFT) {
      left.toggle(isPressed);
    }
    if (keyCode == KeyEvent.VK_S || keyCode == KeyEvent.VK_DOWN) {
      down.toggle(isPressed);
    }
    if (keyCode == KeyEvent.VK_D || keyCode == KeyEvent.VK_RIGHT) {
      right.toggle(isPressed);
    }
  }
  if (isIgnoreInput()) {
    up.toggle(false);
    down.toggle(false);
    left.toggle(false);
    right.toggle(false);
  }
  if (keyCode == KeyEvent.VK_M) {
    this.setPlayMusic(true);
  }
  if (keyCode == KeyEvent.VK_W && isAzertyCountry || keyCode == KeyEvent.VK_Z && !isAzertyCountry) {
    if (Game.getMap() == 2) {
      Game.setChangeLevel(true);
      if (Game.isNpc())       Game.setNpc(false);
    }
  }
  if (keyCode == KeyEvent.VK_N) {
    if (Game.getPlayer().isMoving()) {
      setIgnoreInput(true);
      int n=popup.Warn("String_Node_Str");
      if (n == 0) {
        setIgnoreInput(false);
      }
      return;
    }
    if (!Game.isNpc()) {
      Game.setNpc(true);
      Game.npcSpawn();
      print.print("String_Node_Str",PrintTypes.GAME);
    }
  }
  if (keyCode == KeyEvent.VK_K) {
    if (Game.isNpc()) {
      Game.setNpc(false);
      Game.npcKill();
      print.print("String_Node_Str",PrintTypes.GAME);
    }
  }
  if (keyCode == KeyEvent.VK_A && isAzertyCountry || keyCode == KeyEvent.VK_Q && !isAzertyCountry)   this.quitGame();
  if (keyCode == KeyEvent.VK_BACK_QUOTE) {
    if (!Game.isClosing() && !Game.isDevMode()) {
      Game.setDevMode(true);
      new Thread(new SleepThread());
    }
  }
}

Fixed version (ground truth):
private void toggleKey(int keyCode,boolean isPressed){
  if (!isIgnoreInput()) {
    if (keyCode == KeyEvent.VK_Z && isAzertyCountry || keyCode == KeyEvent.VK_W && !isAzertyCountry || keyCode == KeyEvent.VK_UP) {
      up.toggle(isPressed);
    }
    if (keyCode == KeyEvent.VK_Q && isAzertyCountry || keyCode == KeyEvent.VK_A && !isAzertyCountry || keyCode == KeyEvent.VK_LEFT) {
      left.toggle(isPressed);
    }
    if (keyCode == KeyEvent.VK_S || keyCode == KeyEvent.VK_DOWN) {
      down.toggle(isPressed);
    }
    if (keyCode == KeyEvent.VK_D || keyCode == KeyEvent.VK_RIGHT) {
      right.toggle(isPressed);
    }
  }
  if (isIgnoreInput()) {
    up.toggle(false);
    down.toggle(false);
    left.toggle(false);
    right.toggle(false);
  }
  if (keyCode == KeyEvent.VK_M) {
    this.setPlayMusic(true);
  }
  if (keyCode == KeyEvent.VK_W && isAzertyCountry || keyCode == KeyEvent.VK_Z && !isAzertyCountry) {
    if (Game.getMap() == 2) {
      if (Game.isNpc()) {
        Game.setNpc(false);
      }
      Game.setChangeLevel(true);
    }
  }
  if (keyCode == KeyEvent.VK_N) {
    if (Game.getPlayer().isMoving()) {
      setIgnoreInput(true);
      int n=popup.Warn("String_Node_Str");
      if (n == 0) {
        setIgnoreInput(false);
      }
      return;
    }
    if (!Game.isNpc()) {
      Game.setNpc(true);
      Game.npcSpawn();
      print.print("String_Node_Str",PrintTypes.GAME);
    }
  }
  if (keyCode == KeyEvent.VK_K) {
    if (Game.isNpc()) {
      Game.setNpc(false);
      Game.npcKill();
      print.print("String_Node_Str",PrintTypes.GAME);
    }
  }
  if (keyCode == KeyEvent.VK_A && isAzertyCountry || keyCode == KeyEvent.VK_Q && !isAzertyCountry)   this.quitGame();
  if (keyCode == KeyEvent.VK_BACK_QUOTE) {
    if (!Game.isClosing() && !Game.isDevMode()) {
      Game.setDevMode(true);
      new Thread(new SleepThread());
    }
  }
}