C++ object deleted in slot when UiTools + nativeParentWidget used

from PySide6 import QtWidgets, QtUiTools

def make2():
    x = QtWidgets.QPushButton("Switch back", w)
    x.clicked.connect(lambda: w.setCentralWidget(make1()))
    x.nativeParentWidget()  # No error if this line is commented out
    return x

def make1():
    loader = QtUiTools.QUiLoader()
    inner = loader.load("dbg.ui", w)
    switchButton = inner.findChild(QtWidgets.QPushButton, "switchButton")
    switchButton.clicked.connect(
        lambda: print(switchButton) or w.setCentralWidget(make2())
    )
    return inner

app = QtWidgets.QApplication()
w = QtWidgets.QMainWindow()
w.setCentralWidget(make1())
w.show()
app.exec_()

qt.pysideplugin: Environment variable PYSIDE_DESIGNER_PLUGINS is not set, bailing out.
qt.pysideplugin: No instance of QPyDesignerCustomWidgetCollection was found.
Qt WebEngine seems to be initialized from a plugin. Please set Qt::AA_ShareOpenGLContexts using QCoreApplication::setAttribute and QSGRendererInterface::OpenGLRhi using QQuickWindow::setGraphicsApi before constructing QGuiApplication.
c:/Users/matthew.joyce/Repos/lw8/dbg_deleted_qobjects.py:25: DeprecationWarning: 'exec_' will be removed in the future. Use 'exec' instead.
  app.exec_()
<PySide6.QtWidgets.QPushButton(0x25e7e7b41d0, name="switchButton") at 0x0000025E7FA20640>
qt.pysideplugin: No instance of QPyDesignerCustomWidgetCollection was found.
Traceback (most recent call last):
  File "c:/Users/matthew.joyce/Repos/lw8/dbg_deleted_qobjects.py", line 16, in <lambda>
    lambda: print(switchButton) or w.setCentralWidget(make2())
RuntimeError: Internal C++ object (PySide6.QtWidgets.QPushButton) already deleted.

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Widget</class>
 <widget class="QWidget" name="Widget">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>93</width>
    <height>41</height>
   </rect>
  </property>
  <layout class="QHBoxLayout" name="horizontalLayout">
   <item>
    <widget class="QPushButton" name="switchButton">
     <property name="text">
      <string>Switch</string>
     </property>
    </widget>
   </item>
  </layout>
 </widget>
 <resources/>
 <connections/>
</ui>