reload fails to find document when the document's sharded field has been updated

let(:profile) do

  # Profile shard_key :name

  Profile.create(name: "Alice")

end

it "successfully reloads the document after saving an update to the sharded field" do

  expect(profile.name).to eq("Alice")

  profile.name = "Bob"

  profile.save()

  # Fails

  profile.reload()

  expect(profile.name).to eq("Bob")

end

Failure/Error: raise Errors::DocumentNotFound.new(self.class, _id, _id)

 Mongoid::Errors::DocumentNotFound:

   message:

     Document(s) not found for class Profile with id(s) 606fabb4235bf0215ae36b7f.

   summary:

     When calling Profile.find with an id or array of ids, each parameter must match a document in the database or this error will be raised. The search was for the id(s): 606fabb4235bf0215ae36b7f (1 total) and the following ids were not found: 606fabb4235bf0215ae36b7f.

   resolution:

     Search for an id that is in the database or set the Mongoid.raise_not_found_error configuration option to false, which will cause a nil to be returned instead of raising this error when searching for a single id, or only the matched documents when searching for multiples.

{{"_id"=>BSON::ObjectId('606fabb4235bf0215ae36b7f'), "name"=>"Alice"}}