The input field in popup window cannot input Chinese, such as JBTextField, JBTextArea

I used JBFactory to create a pop-up window with a custom layout, but I found that when I tried to input Chinese in JTextField, my input method tool would go to the lower left corner, and then the JTextField could not display Chinese but could only display the corresponding English letters. I do not know why. The input box in other places can input Chinese information normally, only the pop-up window has problems. I hope someone can help to look at this problem

JPanel popupPanel = new JPanel(new VFlowLayout());
popupPanel.setBorder(BorderFactory.createEmptyBorder(-1,15,-1,15));

JBLabel requestNameLabel = new JBLabel("Request name");
requestNameLabel.setHorizontalAlignment(SwingConstants.LEFT);

JBLabel requestDescLabel = new JBLabel("Request description(Optional)");
requestDescLabel.setHorizontalAlignment(SwingConstants.LEFT);
JBTextField requestNameTextfield = new JBTextField();
requestNameTextfield.setBorder(BorderFactory.createEmptyBorder());
requestNameTextfield.requestFocus();

JBTextArea requestDescTextarea = new JBTextArea();
requestDescTextarea.setPreferredSize(new Dimension(-1,200));
requestDescTextarea.setMargin(new Insets(5, 5, 5, 5));
requestDescTextarea.getEmptyText().setText("Describe your request so you can understand it quickly");

requestNameTextfield.getDocument().addDocumentListener(new DocumentAdapter() {
    @Override
    protected void textChanged(@NotNull DocumentEvent documentEvent) {
        btnSave.setEnabled(!StrUtil.isBlankOrUndefined(requestNameTextfield.getText()));
    }
});

JPanel blankPanel = new JPanel();
blankPanel.setPreferredSize(new Dimension(-1,20));

JPanel blankPanel2 = new JPanel();
blankPanel.setPreferredSize(new Dimension(-1,20));


popupPanel.add(blankPanel);
popupPanel.add(requestNameLabel);
popupPanel.add(requestNameTextfield);
popupPanel.add(blankPanel2);
popupPanel.add(requestDescLabel);
popupPanel.add(requestDescTextarea);
popupPanel.add(toolbar);
IconButton cancelButton = new IconButton("cancel", AllIcons.Actions.Close);

int minSizeWidth = 480;
int minSizeHeight = 400;
JBPopup popup = JBPopupFactory.getInstance().createComponentPopupBuilder(popupPanel, requestNameTextfield)
        .setTitle("SAVE REQUEST")
        .setMovable(true)
        .setResizable(true)
        .setMinSize(new Dimension(minSizeWidth, minSizeHeight))
        .setCancelButton(cancelButton)
        .setCancelOnClickOutside(false)
        .setFocusable(true)
        .setRequestFocus(true)
        .createPopup();
RightToolWindow rightToolWindow = ViewHolder.getInstance(project).getRightToolWindow();
int x = (rightToolWindow.getWidth() - minSizeWidth) / 2;
int y = (rightToolWindow.getHeight() - minSizeHeight) / 2;
popup.show(new RelativePoint(rightToolWindow,new Point(x,y)));
First:

Finally: