Fixture record_testsuite_property does not work with pytest-xdist

According to the docs it is possible to add a junit property at test suite level. This will work fine without pytest-xdist but fails when adding -n2 or similiar to pytest args.

Error description
The test suite properties ARCH, STORAGE_TYPE shown below are not contained in the junit.xml when running pytest-xdist.

Note
I read through the existing test code which does not execute pytest-xdist. Is it wanted to call pytest-xdist in this repository?

How to reproduce

# conftest.py
import pytest

@pytest.fixture(scope="session", autouse=True)
def log_global_env_facts(record_testsuite_property):
    record_testsuite_property("ARCH", "PPC")
    record_testsuite_property("STORAGE_TYPE", "CEPH")

# test_me.py
class TestMe:
    def test_foo(self):
        assert True

(venv) pip list
Package        Version
-------------- -------
apipkg         1.5
atomicwrites   1.4.0
attrs          20.2.0
colorama       0.4.3
execnet        1.7.1
iniconfig      1.0.1
more-itertools 8.5.0
packaging      20.4
pip            20.2.3
pluggy         0.13.1
py             1.9.0
pyparsing      2.4.7
pytest         6.0.2
pytest-forked  1.3.0
pytest-xdist   2.1.0
setuptools     50.3.0
six            1.15.0
toml           0.10.1

Start by reproducing the issue with the shown conftest.py and test_me.py fixtures and pytest-xdist using -n2, then inspect the record_testsuite_property implementation and the JUnit XML output path. Done means ARCH and STORAGE_TYPE appear in junit.xml when the tests run under pytest-xdist, with coverage added for the parallel case.