The reason is that there is no previous page break in the page paragraph setting. Operation method:

1. Select the title text in Word.

2. Right-click the selected text, and then click Paragraph Options in the options menu that opens.

3. Enter the paragraph setting dialog box, and click the line break and paging options in the menu bar above.

4. In the window that opens, select the paging option before the paragraph, and then click OK.