GroupSwitchModifier always present in event.modifiers()

Example code:

import sys
from PyQt6 import QtCore, QtWidgets

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, app):
    super().__init__()
    self.show()

def mousePressEvent(self, event):
    print(event.modifiers())
    return super().mousePressEvent(event)

app = QtWidgets.QApplication(sys.argv)
win = MainWindow(app)
app.exec()

With the 6.1.1. installation (PyQt6==6.1.1, PyQt6-Qt6==6.1.1) I get the expected results when clicking, for example:

KeyboardModifier.NoModifier
KeyboardModifier.ControlModifier
KeyboardModifier.AltModifier
KeyboardModifier.ShiftModifier

After upgrade to the latest versions, I get this instead for the same mouse/key presses (on Linux with Xorg and also Wayland):

KeyboardModifier.GroupSwitchModifier
KeyboardModifier.GroupSwitchModifier|ControlModifier
KeyboardModifier.GroupSwitchModifier|AltModifier
KeyboardModifier.GroupSwitchModifier|ShiftModifier

The same seems to have been reported here for Qt5 but I wasn't  sure whether I should re-open that ticket: QTBUG-95108. That tickets links the bug to QTBUG-49771.

Also, upon inspecting this, I noticed that an upgrade to current yields these version numbers: PyQt6==6.1.1, PyQt6-Qt6==6.1.2, which are indeed the latest releases on Pypi for these packages. Pinning PyQt6 to any version always pulls the latest PyQt6-Qt6 and I have to pin it separately. That seems weird to me, but I'm not sure if that's a bug and should be reported as such.