n1ql does not honor order-by for aggregate push-down on partitioned index

Using beer-sample, create a partitioned index with (1) index-key matches group-by key, (2) index-key matches partition key.

create index category on `beer-sample`(category) partition by hash(category);

Aggregate query is push-down to partitioned index, expecting full-aggregate result. Gsi client returns full aggregated result in sorted order, but the final query result is not in sorted order.

cbq> select category, count(category) from `beer-sample` where category is not missing group by category order by category;
{
"requestID": "7828e134-f4b3-4c9c-aa48-61f41ac0042f",
"signature":

{ "$1": "number", "category": "json" }

,
"results": [

{ "$1": 564, "category": "North American Lager" }

,

{ "$1": 327, "category": "Belgian and French Ale" }

,

{ "$1": 320, "category": "British Ale" }

,

{ "$1": 1996, "category": "North American Ale" }

,

{ "$1": 4, "category": "Other Lager" }

,

{ "$1": 218, "category": "German Ale" }

,

{ "$1": 285, "category": "Irish Ale" }

,

{ "$1": 268, "category": "Other Style" }

,

{ "$1": 441, "category": "German Lager" }

],
"status": "success",
"metrics":

{ "elapsedTime": "27.064367ms", "executionTime": "27.046865ms", "resultCount": 9, "resultSize": 672 }

}