Artifact downloads lots of errors and failures

Having lots of issues downloading packages. It always generates lots of noisy retry errors, and sometimes dies altogether.

Example:

$ az artifacts universal download \
> --organization "https://msazure.visualstudio.com/" ...

Universal Packages is currently in preview.
Ignoring --cache-directory because the cache is not yet supported on OS "Linux 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u2 (2019-11-11)".

[https://vsblobprodeussu2shard35.blob.core.windows.net/XXXXXXXXXXXXXXX] Try 1/5, retryable exception caught. Retrying in 00:00:01.
[https://vsblobprodeussu2shard29.blob.core.windows.net/XXXXXXXXXXXXXXX] Try 1/5, retryable exception caught. Retrying in 00:00:01.

...
d8-session-c2866ccb-98ec4818-b672fde2-c21b9d37] Try 1/5, non-retryable exception caught. Throwing. Details:
Task was requested to be canceled.
[https://vsblobprodeussu2shard25.blob.core.windows.net/XXXXXXXX] Try 1/5, retryable exception caught. Retrying in 00:00:01.
Encountered an unexpected error.
System.AggregateException: One or more errors occurred. (One or more errors occurred. (Name or service not known) (Name or service not known))
---> System.AggregateException: One or more errors occurred. (Name or service not known) (Name or service not known)
---> System.Net.Http.HttpRequestException: Name or service not known
---> System.Net.Sockets.SocketException (0xFFFDFFFF): Name or service not known
at System.Net.Http.ConnectHelper.ConnectAsync(String host, Int32 port, CancellationToken cancellationToken)
--- End of inner exception stack trace ---
at Microsoft.VisualStudio.Services.Content.Common.ArtifactHttpRetryMessageHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
at System.Net.Http.HttpClient.FinishSendAsyncBuffered(Task`1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts)
at Microsoft.VisualStudio.Services.WebApi.VssHttpClientBase.SendAsync(HttpRequestMessage message, HttpCompletionOption completionOption, Object userState, CancellationToken cancellationToken)
at Microsoft.VisualStudio.Services.WebApi.VssHttpClientBase.SendAsync(HttpMethod method, Guid locationId, Object routeValues, ApiResourceVersion version, HttpContent c