async-cache | Cache your async lookups and do n't fetch the same thing | Caching library

I'm trying to use AzureServiceTokenProvider to get an access token to call a custom service, but it's intermittently returning an expired token. I understand that AzureServiceTokenProvider caches the token and retrieves a new one before expiration, but this is a brand new token in a brand new debugging session. Example debugging session:

Current UTC time: 3/6/2021 5:57:16 AM

But token returned is already expired?? 3/6/2021 5:27:40 AM UTC

I'm getting this behavior locally AND when deployed to Azure, but it's intermittent.

• I'm using the latest Microsoft.Azure.Services.AppAuthentication 1.6.1 as of this writing.
• I'm following https://docs.microsoft.com/en-us/dotnet/api/overview/azure/service-to-service-authentication#running-the-application-using-managed-identity-or-user-assigned-identity to get the token with managed identity in Azure and using my Azure account (which has API permissions to the custom service) when debugging locally with Visual Studio.

Update: I also tried GetAuthenticationResultAsync with forceRefresh set to true based on the recommendation from https://github.com/Azure/azure-sdk-for-net/issues/16718 but still got an expired token with the same 3/6/2021 5:27:40 AM date.