QTabWidget bug

In the following code i have created a QTabWidget with Qt Designer which has 6 pages.

After ui compile finished i write the following line of code in the exported py file:

self.tabWidget.setTabVisible(5,False)

so i set the the last page of QTabWidget to be hidden.

The full py code as attachement:

The problem with the execution of this code is that i cannot navigate to all the pages with displayed arrow keys in the corner of QTabWidget

If i remove the one line snippet code then i can normally navigate.

Is there any related bug i have to know?
How can i fix this error?

Os version: Linux chris-Inspiron-3847 5.4.0-110-generic #124-Ubuntu SMP Thu Apr 14 19:46:19 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

PyQt5 version: 5.15.4

Note that if i resize the QDialog window then all visible page are display correctly.

Also note, that this error only oquered when i hide the *last* page.

I have one possible solution:

self.tabWidget.update()

after page hide, but it didn't work .