Too many subqueries or query is too complex for "Job Concurrency Slow"

Hi, I've successfully copied over most of the data sources for [BigQuery System Tables Reports](https://github.com/GoogleCloudPlatform/bigquery-utils/tree/master/dashboards/system_tables) but hit an issue with the "Job Concurrency Slow" datasource. When I swap the `INFORMATION_SCHEMA_PUBLIC_V2` references for `` `region-{region_name}`.INFORMATION_SCHEMA`` and reconnect I see the error:

```
Resources exceeded during query execution: Not enough resources for query planning - too many subqueries or query is too complex.
```

Is this expected? Is there a simplified query I can use instead?