JSON-RPC python tests frequently fail with OSError: [Errno 9] Bad file descriptor

[link2xt]

Failure looks like this:

 ================================== FAILURES ===================================
_______________________________ test_acfactory ________________________________
[gw1] win32 -- Python 3.13.0 D:\a\deltachat-core-rust\deltachat-core-rust\deltachat-rpc-client\.tox\py\Scripts\python.EXE

acfactory = <deltachat_rpc_client.pytestplugin.ACFactory object at 0x000002049AC1DB50>

    def test_acfactory(acfactory) -> None:
        account = acfactory.new_configured_account()
        while True:
            event = account.wait_for_event()
            if event.kind == EventType.CONFIGURE_PROGRESS:
                assert event.progress != 0  # Progress 0 indicates error.
                if event.progress == 1000:  # Success
                    break
            else:
>               print(event)
E               OSError: [Errno 9] Bad file descriptor

tests\test_something.py:60: OSError

This looks like a problem with print usage in pytest when print attempts to print directly and something else (pytest?) closed the file descriptor.

pytest is configured in tox.ini with log_cli = true, maybe this changes something.

Here is CI log (from windows runner): job-logs.txt

This is not the result of teardown, because by the time test_acfactory test failed with this print exception only 50% of tests passed and other tests continue to run successfully.