Problems with summary and total Items

[mantfacil]

First of all, thank you very much for your contribution.

I have a problem with the summary and the totalItems. These are the steps that I perform in a data grid.

1. I start the grid with a summaryType, of type count, on a column. Ex: total: 55
2. Group on another column. The total remains at 55
3. Filter on a value of the grouped column. The total should be changed to 1, but remains at 55.

I have this codepen: (https://codepen.io/Diego_MF/pen/MWEpbbG) where I communicate with one devexpress api and all this that I tell you works well.

When I look at how the data comes in, I see differences in it.
This is how it comes on devexpress:
{"data": [{"key": "Arizona", "items": null, "count": 1, "summary": [1]}], "summary": [1]}
{"data": [{"OrderNumber": 39420, "SaleAmount": 20500, "StoreCity": "Tuscon", "StoreState": "Arizona", "Employee": "Jim Packard", "OrderDate": "2013 / 12/28 "}]," summary ": [1]}

This is how it comes from the DRF api:

{"data": [{"key": "City", "count": 1, "summary": [1], "items": null}]}
{"totalCount": 1, "summary": [1], "data": [{"city_key": "10001", "city_code": "bue", "city_name": "Buenos Aires"}]}

Also, within my script I have declared remoteOperations: true and the summary is declared like this:
summary: { totalItems: [{ column: "city_key", summaryType: 'count' }] }

I use Django version 3.2.4 and djangorestframework version 3.12.4