Backfill policy doesn't seem to effect graph_multi_asset

[steffyd]

We have a graph_multi_asset that has 2 optional assets that are partitioned by day that can be generated:

@graph_multi_asset(
    outs={
        "intercom_receipts": AssetOut(
                                key="intercom_receipts",
                                is_required=False,
                                io_manager_key="arangodb_io_manager",
                                metadata={
                                    "db_name": "external_data_sources",
                                    "collection_name":"intercom_receipts"
                                },
                                freshness_policy=FreshnessPolicy(
                                    maximum_lag_minutes=60,
                                    cron_schedule="0 0 * * *"
                                ),
                                auto_materialize_policy=AutoMaterializePolicy.eager(),
                                backfill_policy=BackfillPolicy.multi_run(max_partitions_per_run=100)
                            ),
        "intercom_clicks": AssetOut(
                                key="intercom_clicks",
                                is_required=False,
                                io_manager_key="arangodb_io_manager",
                                metadata={
                                    "db_name": "external_data_sources",
                                    "collection_name":"intercom_clicks"
                                },
                                freshness_policy=FreshnessPolicy(
                                    maximum_lag_minutes=60,
                                    cron_schedule="0 0 * * *"
                                ),
                                auto_materialize_policy=AutoMaterializePolicy.eager(),
                                backfill_policy=BackfillPolicy.multi_run(max_partitions_per_run=100)
                            ),
    },
    can_subset=True,
    partitions_def=DailyPartitionsDefinition(start_date="2021-01-01")
)

When trying to generate a backfill for this asset, instead of the expected behavior of a Run with 100 partitions given to it, we generate a single Run per partition.

Is this a bug, or am I doing something incorrectly? If it's a bug, is there a different way this could be structured so I could run multiple partitions in a single run?

Thanks!

[steffyd]

I discovered there was a separate backfill_policy setting on the @graph_multi_asset tag that needed to be set. It would be great if there was some sort of notification that the AssetOut backfill_policy isn't used when in a graph_multi_asset list of Outs.