QStackedWidget: Cannot switch to newly added page in design view using navigation arrows

Description:
When I add a new page to a QStackedWidget in Qt Designer, the page is successfully added and appears under the QStackedWidget in the Object Inspector. However, clicking the right arrow (page navigation arrow) on the QStackedWidget in the design area does not switch the view to the new page. The arrow is visible and clickable, but nothing happens—the displayed page does not change, and I am unable to edit or layout the newly added page in the design view. This issue prevents designing and editing multiple pages within the QStackedWidget using the designer interface.