PackageMetadataRepository.Get returns OctopusResourceNotFoundException

[eduherminio]

I'm not able to successfully use PackageMetadataRepository.Get(string id), getting OctopusResourceNotFoundException in every attempt.
I've tried both PackageFromBuiltInFeedResource.Id and PackageFromBuiltInFeedResource.PackageId (although the second one doesn't make sense, since it doesn't include the version).

Is it a bug or am I missing something and providing the wrong id?

Repro:

var octopusEndpoint = new OctopusServerEndpoint("<server>", "<apikey>");
var client = OctopusAsyncClient.Create(octopusEndpoint).Result;

var package = await client.Repository.BuiltInPackageRepository.ListPackages(packageId: "<existing_package");
var meta = await client.Repository.PackageMetadataRepository.Get(package.Items[0].Id);
var meta2 = await client.Repository.PackageMetadataRepository.Get(package.Items[0].PackageId);