google-cloud-dotnet: Datastore query projection with datetime returns integer

I have datetime type in my projection and it returns me integer value instead of timestamp value. If I remove the datetime type from projection, I get correct type back. Below is sample query -

    Query query = new Query(historical)
            {
                Filter = filter,
                Projection = { stocksymbol, date },
                DistinctOn = { stocksymbol },
                Order = {
                    { stocksymbol, PropertyOrder.Types.Direction.Descending },
                    { date, PropertyOrder.Types.Direction.Descending }
                        }
            };

            var queryResult = await dataStore.RunQueryAsync(query);

queryResult.Entities.Properties[date] return back Integer value.

I read about similar issue here (https://github.com/googleapis/google-cloud-node/issues/1319) and the workaround given is not working for me.

This is my modified code with the workaround but I still get incorrect date:

var result = new DateTime(Convert.ToInt64(x.Properties[date].IntegerValue.ToString(), 10) / 1000)

Any ideas what I am missing or how do i fix this issue?