SIGSEGV after reconnecting a signal with argument in an inner class

Hi,

after upgrading to PySide 6.5.3 I am running in a SIGSEGV when changing the current item in a QComboBox and disconnecting/reconnecting the currentIndexChanged signal. I did not have any issue with PySide 6.5.2.

After a lot of trial and error I could pin this down to the fact, that my QComboBox and signal connections were part of an inner class that is derived from QObject. I managed to create a small reproduction case using only a simple signal with an argument that I am attaching.
The issue does not show all the time but if it does, it is mostly already on the first execution.

The backtrace always looks like this:

#0  0x00007fffd7399e24 in QObject::setProperty(char const*, QVariant const&) ()
   from .../venv/lib/python3.11/site-packages/PySide6/Qt/lib/libQt6Core.so.6
#1  0x00007fffd80fc339 in ?? ()
   from .../venv/lib/python3.11/site-packages/PySide6/libpyside6.abi3.so.6.5
#2  0x00007fffd739b9df in ?? ()
   from .../venv/lib/python3.11/site-packages/PySide6/Qt/lib/libQt6Core.so.6
#3  0x00007fffd80fb2af in PySide::SignalManager::SignalManagerPrivate::qtMethodMetacall(QObject*, int, void**) ()
from .../venv/lib/python3.11/site-packages/PySide6/libpyside6.abi3.so.6.5
...

I am running debian testing with Python 3.11 with venv. The PySide version was installed using pip.

Thanks for looking into this and best wishes,

Martin.