ReSharper ignoring/reading wrong runsettings file

After installing Visual Studio 2022 and updating our automation framework to .NET 6. I am finding that ReSharper is ignoring the runsettings file selected from the VS menu ( Test > Configure Run Settings > Select Solution Wide runsettings File):

TestContext.Properties collection when debugging test from VS TestExplorer (MSTest Runner):

TestContext.Properties collection when debugging test from ReSharper Test Runner:

In my case, because the values are not read from the runsettings file, the test fails with a 'System.ArgumentNullException: Value cannot be null.' error before completing test initialization. As a workaround, I can change the option to 'Use specific test settings file' but this causes a slight different issue because if you change the option back to 'User .runsettings/.testsettings selected in VS UI' then despite any seleciton from VS UI, ReSharper continues to use the file specifically selected. Finally, this issue does not occur when running the same test/code in VS 2019.


.runsettings file:
<?xml version="1.0" encoding="utf-8" ?>
<RunSettings>
    <RunConfiguration>
    <ResultsDirectory>.\TestResults</ResultsDirectory>
    <TreatNoTestsAsError>true</TreatNoTestsAsError>
    </RunConfiguration>
    <TestRunParameters>
    <Parameter name="archiveResults" value="false" />
    <Parameter name="environment" value="tst" />
        <Parameter name="platform" value="2" />
    </TestRunParameters>
</RunSettings>

Versions:
• Microsoft Visual Studio Professional 2022 (64-bit) v 17.1.2
• NET 6.0.3
• ReSharper 2021.3.4 Build 213.0.20220322.123539 built on 2022-03-22
• MSTest.TestAdapter v 2.2.8
• MSTest.TestFramework v 2.2.8