Template parameters don't work if they are only used in DoFns

import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.options.ValueProvider;
import org.apache.beam.sdk.transforms.Create;
import org.apache.beam.sdk.transforms.DoFn;
import org.apache.beam.sdk.transforms.ParDo;

public class BugPipeline {
  public interface Options extends PipelineOptions {
    ValueProvider<String> getFoo();
    void setFoo(ValueProvider<String> foo);
  }
  public static void main(String[] args) throws Exception {
    Options options = PipelineOptionsFactory.fromArgs(args).as(Options.class);
    Pipeline p = Pipeline.create(options);
    p.apply(Create.of(1)).apply(ParDo.of(new DoFn<Integer, String>() {
      @ProcessElement
      public void processElement(ProcessContext context) {
        System.out.println(context.getPipelineOptions().as(Options.class).getFoo());
      }   
    }));
    p.run();                                                                                                                                                                                                                                                                                                                  
  }

}

$java BugPipeline --project=$PROJECT --stagingLocation=$STAGING --templateLocation=$TEMPLATE --runner=DataflowRunner
$gcloud dataflow jobs run $NAME --gcs-location=$TEMPLATE --parameters=foo=bar

ERROR: (gcloud.dataflow.jobs.run) INVALID_ARGUMENT: (2621bec26c2488b7): The workflow could not be created. Causes: (2621bec26c248dba): Found unexpected parameters: ['foo' (perhaps you meant 'zone')]
- '@type': type.googleapis.com/google.rpc.DebugInfo
  detail: "(2621bec26c2488b7): The workflow could not be created. Causes: (2621bec26c248dba):\
    \ Found unexpected parameters: ['foo' (perhaps you meant 'zone')]"

@Validation.Required