``` ob.OnPublicStaticEvent(EventArgsTest(10)) assert handler.value == 20 ob.PublicStaticEvent -= h1 ob.OnPublicStaticEvent(EventArgsTest(10)) > assert handler.value == 30 E assert 40 == 30 E + where 40 = <tests.utils.MultipleHandler object at ADDR>.value tests\test_event.py:419: AssertionError ``` It happened only with Python 3.10 and only on Windows.