Program: 49863
Project: 49863
Buggy source:
private void initComponents(SquareConfig squareConfig){
  mTeamInfos.forEach(teamInfo -> {
    int offsetTeamId=teamInfo.teamId - 1;
    GridBagConstraints constraints=new GridBagConstraints();
    JPanel teamPanel=new JPanel();
    teamPanel.setLayout(new GridBagLayout());
    teamPanel.setOpaque(false);
    constraints.gridy=0;
    constraints.insets=new Insets(0,0,10,0);
    constraints.gridwidth=2;
    constraints.anchor=GridBagConstraints.CENTER;
    constraints.fill=GridBagConstraints.BOTH;
    constraints.weightx=1.0;
    teamPanel.add(GuiUtility.createJLabel(Messages.getString("String_Node_Str") + teamInfo.teamId),constraints);
    teamInfo.label=new SquareJLabel(BoardCoordinate.at(1,teamInfo.teamId));
    squareConfig.configureSquare(teamInfo.label);
    constraints.gridy=1;
    constraints.weightx=0.5;
    constraints.weighty=1.0;
    constraints.insets=new Insets(0,0,10,0);
    teamPanel.add(teamInfo.label,constraints);
    constraints.gridy=2;
    constraints.gridwidth=1;
    constraints.weighty=0.0;
    constraints.weightx=0.0;
    constraints.insets=new Insets(0,0,10,10);
    teamPanel.add(GuiUtility.createJLabel(Messages.getString("String_Node_Str")),constraints);
    constraints.gridy=2;
    constraints.gridx=1;
    constraints.weightx=1.0;
    constraints.insets=new Insets(0,0,10,0);
    mTeamNameFields[offsetTeamId]=new JTextField(20);
    mTeamNameFields[offsetTeamId].setText(Messages.getString("String_Node_Str"));
    mTeamNameFields[offsetTeamId].setPreferredSize(new Dimension(50,25));
    constraints.anchor=GridBagConstraints.WEST;
    teamPanel.add(mTeamNameFields[offsetTeamId],constraints);
    constraints.gridy=3;
    constraints.gridx=0;
    constraints.weightx=0.0;
    constraints.insets=new Insets(0,0,10,10);
    constraints.anchor=GridBagConstraints.CENTER;
    teamPanel.add(GuiUtility.createJLabel(Messages.getString("String_Node_Str")),constraints);
    constraints.gridy=3;
    constraints.gridx=1;
    constraints.weightx=1.0;
    constraints.insets=new Insets(0,0,10,0);
    constraints.anchor=GridBagConstraints.WEST;
    mTeamColorFields[offsetTeamId]=new JLabel();
    mTeamColorFields[offsetTeamId].setBackground(teamInfo.color);
    mTeamColorFields[offsetTeamId].setOpaque(true);
    createMouseListener(mTeamColorFields[offsetTeamId],teamInfo);
    teamPanel.add(mTeamColorFields[offsetTeamId],constraints);
    constraints.gridx=teamInfo.teamId;
    constraints.gridy=0;
    constraints.insets=new Insets(0,25,0,25);
    constraints.anchor=GridBagConstraints.CENTER;
    constraints.fill=GridBagConstraints.BOTH;
    add(teamPanel,constraints);
  }
);
}

Fixed version (ground truth):
private void initComponents(SquareConfig squareConfig){
  mTeamInfos.forEach(teamInfo -> {
    int offsetTeamId=teamInfo.teamId - 1;
    GridBagConstraints constraints=new GridBagConstraints();
    JPanel teamPanel=new JPanel();
    teamPanel.setLayout(new BoxLayout(teamPanel,BoxLayout.PAGE_AXIS));
    teamPanel.setOpaque(false);
    teamPanel.add(GuiUtility.createJLabel(Messages.getString("String_Node_Str") + "String_Node_Str" + teamInfo.teamId));
    teamInfo.label=new SquareJLabel(BoardCoordinate.at(1,teamInfo.teamId));
    squareConfig.configureSquare(teamInfo.label);
    teamInfo.label.setMaximumSize(new Dimension(100,100));
    teamPanel.add(teamInfo.label);
    JPanel teamNamePanel=new JPanel();
    teamNamePanel.setOpaque(false);
    teamNamePanel.setLayout(new BoxLayout(teamNamePanel,BoxLayout.LINE_AXIS));
    teamNamePanel.add(GuiUtility.createJLabel(Messages.getString("String_Node_Str")));
    Dimension minSize=new Dimension(5,25);
    Dimension prefSize=new Dimension(5,25);
    Dimension maxSize=new Dimension(Short.MAX_VALUE,25);
    teamNamePanel.add(new Box.Filler(minSize,prefSize,maxSize));
    teamNamePanel.add(Box.createHorizontalGlue());
    mTeamNameFields[offsetTeamId]=new JTextField(20);
    mTeamNameFields[offsetTeamId].setText(teamInfo.teamName);
    mTeamNameFields[offsetTeamId].setPreferredSize(new Dimension(50,25));
    teamNamePanel.add(mTeamNameFields[offsetTeamId]);
    teamPanel.add(new Box.Filler(new Dimension(5,10),new Dimension(5,10),new Dimension(Short.MAX_VALUE,10)));
    teamPanel.add(teamNamePanel);
    JPanel teamColorPanel=new JPanel();
    teamColorPanel.setOpaque(false);
    teamColorPanel.setLayout(new BoxLayout(teamColorPanel,BoxLayout.LINE_AXIS));
    teamColorPanel.add(GuiUtility.createJLabel(Messages.getString("String_Node_Str")));
    teamColorPanel.add(new Box.Filler(minSize,prefSize,maxSize));
    teamColorPanel.add(Box.createHorizontalGlue());
    mTeamColorFields[offsetTeamId]=new JTextField(20);
    mTeamColorFields[offsetTeamId].setBackground(teamInfo.color);
    mTeamColorFields[offsetTeamId].setEditable(false);
    createMouseListener(mTeamColorFields[offsetTeamId],teamInfo);
    teamColorPanel.add(mTeamColorFields[offsetTeamId]);
    teamPanel.add(new Box.Filler(new Dimension(5,10),new Dimension(5,10),new Dimension(Short.MAX_VALUE,10)));
    teamPanel.add(teamColorPanel);
    constraints.gridx=teamInfo.teamId;
    constraints.gridy=0;
    constraints.weightx=1.0;
    constraints.weighty=1.0;
    constraints.insets=new Insets(0,25,10,25);
    constraints.anchor=GridBagConstraints.CENTER;
    constraints.fill=GridBagConstraints.BOTH;
    add(teamPanel,constraints);
  }
);
}