Command fails when multiple sessions executing at the same time

We have a test automation suite which runs multiple tests in parallel through Azure DevOps pipelines. These tests call `Disable-AzContextAutosave` when they start, and when multiple tests start at exactly the same time (in separate Powershell instances) we often get the following error:

```
Disable-AzContextAutosave : The given key was not present in the dictionary.
At C:\devops_agent_A\_work\_temp\azureclitaskscript1634703545536_inlinescript.ps1:6 char:3
+ Disable-AzContextAutosave -Scope Process | Out-Null
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Disable-AzContextAutosave], KeyNotFoundException
+ FullyQualifiedErrorId : System.Collections.Generic.KeyNotFoundException,Microsoft.Azure.Commands.Profile.Context
.DisableAzureRmContextAutosave

The given key was not present in the dictionary.
at System.Collections.Concurrent.ConcurrentDictionary`2.get_Item(TKey key)
at Microsoft.Azure.PowerShell.Common.Share.Survey.SurveyHelper.ShouldModulePrompt(SurveyHelper helper, String moduleName, Int32 majorVersion)
at Microsoft.Azure.PowerShell.Common.Share.Survey.SurveyHelper.ShouldFlush(String moduleName, Int32 majorVersion, Func`4 condition, Action`3 updateModule)
at Microsoft.Azure.PowerShell.Common.Share.Survey.SurveyHelper.ShouldPropmtSurvey(String moduleName, Version moduleVersion)
at Microsoft.WindowsAzure.Commands.Utilities.Common.AzurePSCmdlet.EndProcessing()
at System.Management.Automation.CommandProcessorBase.Complete()
```

We expected these calls to succeed, rather than throwing this exception. It appears that the relevant code lives in this repo but please redirect me if I'm in the wrong place!