Typesense group_by working incorrect

[quanleo94]

Description

Hey team,
I have a trouble with typesense api with group_by and I spent a lot of time but it work incorrect
I want to group_by data with geo type.
But it always return 1 coordinates

Steps to reproduce

1. Create the schema

{
    "name": "shops",
    "fields": [
        {
            "name": "id",
            "type": "string",
            "facet": false
        },
        {
            "name": "category",
            "type": "string",
            "facet": false
        },
        {
            "name": "address",
            "type": "string",
            "facet": false
        },
        {
            "name": "coordinates",
            "type": "geopoint",
            "facet": true
        },
        {
            "name": "name",
            "type": "string",
            "facet": false
        },
        {
            "name": "description",
            "type": "string",
            "facet": false
        },
        {
            "name": "tags",
            "type": "string[]",
            "facet": true
        }
    ],
    "default_sorting_field": "priority",
    "searchable_fields": [
        "category",
        "location",
        "tags"
    ]
}

2. Import data

"id","category","address","coordinates","name","description","tags"
"1", "funiture", "location1", [21.144536, 105.876222], "shop1", "shop1", ["funiture","chair"]
"2", "techology", "location1", [21.144536, 105.876222], "shop2", "shop2", ["iphone","ipad"]
"3", "techology", "location1", [21.153536, 105.816222], "shop3", "shop3", ["samsung","galaxy"]
"4", "techology", "location1", [21.167536, 105.854222], "shop4", "shop4", []

3. Query data.

http://localhost:8108/collections/shops/documents/search?q=*&filter_by=coordinates:(21.144536, 105.876222, 100 km)&group_by=coordinates&per_page=250

Expected Behavior

I want to return data group by location.
Please help me group list location data
if have, only return list location group without hits response in group

Actual Behavior

Only return data with group_key 1 location is 21.144536, 105.876222

Metadata

Typesense Version: typesense/typesense 0.25.2 (docker image)

OS: