title: Some packages can't be downloaded from Azure DevOps Artifacts feed with NuGet upstream source
body: <p>I created an Azure Artifact Feed and configured nuget gallery as upstream, however when I try to install package Newtonsoft.Json.Bson it always fails with error: <code>Install-Package : NU1101: Unable to find package Newtonsoft.Json.Bson. No packages exist with this id in source(s): MyFeed, Microsoft Visual Studio Offline Packages</code>, it's very confusing that some packages work fine but some not.</p>
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