I have Sticky 1.24 installed.
A line in my xsession-errors file says:
/usr/lib/sticky/sticky.py:813: DeprecationWarning: Gio.DBusConnection.register_object is deprecated
self.dbus_register_id = connection.register_object(
The corresponding documentation on https://docs.gtk.org/gio/method.DBusConnection.register_object_with_closures.html says:
Deprecated since: 2.84
Deprecated in favour of g_dbus_connection_register_object_with_closures2(), which has more binding-friendly reference counting semantics.`
There is also an issue at the pygobject gitlab page https://gitlab.gnome.org/GNOME/pygobject/-/issues/688