mdiArea.ViewMode() doesn't detects modes properly.

Some tests make me believe self.mdiArea.ViewMode() Doesn't work properly. It always returns SubWindowView even if it's in tabbed mode.

Easy reproduct:

from PySide2.QtWidgets import QMdiSubWindow

if self.mdiArea.ViewMode() == self.mdiArea.SubWindowView:
   print("it is subwindow mode")
   self.mdiArea.setViewMode(self.mdiArea.TabbedView)
print(self.mdiArea.ViewMode())

It prints:

it is subwindow mode
PySide2.QtWidgets.QMdiArea.ViewMode.SubWindowView

But it should print PySide2.QtWidgets.QMdiArea.ViewMode.TabbedView since we just changed it upthere.
I also tried to directly use self.mdiArea.setViewMode(QMdiArea.TabbedView) but that made no difference.

btw: how do I add in-line code tags for just a word in this editor? I'm using bold because of that.