No test results XML after pipeline run

Hello,

I have created a build pipeline in Azure DevOps. It calls my selfhosted build server via Powershell script, which executes tests run command:
"<path>\Unity.exe" -platform editmode -runTests -batchmode -logFile "stdout-tests.log" -projectPath <projectpath> -testResults "test_results.xml"

The problem with this is that while running the script from build server works flawlessly, running pipeline ends with Unity exit code 3 and no test results XML file created.

I have noticed that output log in pipeline-run contains following:
Multiple unexpected errors happened while running tests.
...
Uploading Crash Report

However when I run the script locally the XML is produced, even though some tests fail.

EDIT:
Found out a workaround. Changing account on VS Agent from SYSTEM NETWORK to local Admin resolves the issue. I don't think it's a good practice from security reasons, so I'm still looking for proper resolution.

 

I'm having the same issue at the moment, but I'm already using the admin account. Any other ideas on how to fix this?