Quit menu item being removed

I’ve recently returned to creating gui’s in python, so excuse me if this is an old issue. I’m using PySide6 and Qt Designer to create an app. I have a typical “File” menu with “quit” as the last menu item. When I run the code, the quit has been removed and a new “Python” main menu item has been introduced to the left of my File menu. It does have a “quit Python” item which closes the app. Is this normal behavior now? Is there another way to launch it that would preserve my menus?

@John_Alden
It looks to me you didn’t regenerate *.ui maybe? Like:

$ pyside6-uic mainwindow.ui -o MainWindow.py

Or you loading wrong UI file by mistake, into your PYSide6 application?
Can you share code which reproduce scenario?