record_xml_attribute not visible in JUnit XML when using pytest-xdist

Currently pytest-xdist is working without a problem with record_property, but it does not save the values using record_xml_attribute fixture.

Here's the code to reproduce this issue

import pytest

def test_xdist_xml(record_xml_attribute):
    record_xml_attribute("key", 1)

I run this this test twice using following command:
py.test test_example.py --junit-xml=without_xdist.xml and then py.test test_example.py --junit-xml=with_xdist.xml -n auto

without_xdist.xml

<testcase classname="test_example" file="test_example.py" key="1" line="2" name="test_xdist_xml" time="0.001"></testcase>

with_xdist.xml

<testcase classname="test_example" file="test_example.py" line="2" name="test_xdist_xml" time="0.002"></testcase>

So it looks like key="1" is missing from junit XML when using xdist.

I've tested it using latest pytest (5.4.2) and pytest-xdist (1.32.0)
Thanks for any help.

Start with the test_example.py reproducer and run it once normally and once with pytest-xdist using the commands shown. Compare the generated JUnit XML and trace how record_xml_attribute data is handled across workers; done means the key="1" attribute is present in the xdist output as it is without xdist.