This is hanging on at least one Spanish run and is likely the cause of most of our Spanish hangs recently.

• https://dev.azure.com/dnceng/public/_build/results?buildId=815827&view=results
• https://dev.azure.com/dnceng/public/_build/results?buildId=816120&view=results
• https://dev.azure.com/dnceng/public/_build/results?buildId=814907&view=results

Using the dump file published with this test failure and following the async test hang guide I determined this was the cause.

Will send a PR to disable this test.