MultipleOperationsOverSingleHandle_CompletedWorkItemCountTest frequent failures

[directhex]

Description

Assert.InRange() Failure\r\nRange:  (0 - 60000)\r\nActual: 60016

https://dev.azure.com/dnceng/public/_build/results?buildId=1039498
https://dev.azure.com/dnceng/public/_build/results?buildId=1039390
https://dev.azure.com/dnceng/public/_build/results?buildId=1035778

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.