REG->6.8.0.1: Some subclasses missing when importing * after importing a module

The following subclasses are missing when importing QtCore, QtGui, and QtWidgets and then importing * from them:

1. QAbstractEventDispatcher.TimerInfo
2. QAbstractTextDocumentLayout.PaintContext
3. QAbstractTextDocumentLayout.Selection
4. QAccessible.State
5. QByteArray.FromBase64Result
6. QCalendar.SystemId
7. QCalendar.YearMonthDay
8. QDirListing.DirEntry
9. QFormLayout.TakeRowResult
10. QPageRanges.Range
11. QPainter.PixmapFragment
12. QPainterPath.Element
13. QProcess.UnixProcessParameters
14. QRhiTexture.ViewFormat
15. QTextEdit.ExtraSelection
16. QTextLayout.FormatRange

The following code demonstrates a different behavior when importing a Qt module and not:

IMPORT_MODULES = False

_init = set(globals())
if IMPORT_MODULES:
    from PySide6 import QtCore
    from PySide6 import QtGui
    from PySide6 import QtWidgets

from PySide6.QtCore import *
from PySide6.QtGui import *
from PySide6.QtWidgets import *
_imported = set(globals()) - _init


def subclasses():
    import enum

    for class_name in _imported:
        if class_name[1].isupper() and isinstance((cls:=globals()[class_name]), type):
            for subclass_name in cls.__dict__:
                if subclass_name[0].isupper():
                    if isinstance((subclass:=getattr(cls, subclass_name)), type) and enum.Enum not in subclass.__mro__:
                        yield class_name, subclass_name


print(sum(1 for _ in subclasses()), "subclasses found")
print(*sorted(map('.'.join, subclasses())), sep='\n')

With IMPORT_MODULES set to False, it finds 30 non-Enum subclasses, whereas with True, only 14.

The same behavior takes place when instead of from PySide6 import <module> one does from PySide6.<module> import <something>.