why my FormBuilder does not reset the values? - flutter

Question

I use a FormBuilder with a global key, I have a showModalBottomSheet in which i have my filters rendered, before I click the apply button my filters are reset, but after I applied the filters and I want to reset my filters, my _formKey.currentState?.reset() stops working.
I think the problem is in _buildFilterField but I don't quite understand how to reset it.
final _formKey = GlobalKey<FormBuilderState>();
var filterData;
bool isFilterLoading = true;
Future showFilter(context) => showModalBottomSheet(
isScrollControlled: true,
context: context,
builder: (context) => StatefulBuilder(builder: (context, innerSetState) {
Future.delayed(const Duration(milliseconds: 700), () {
innerSetState(() {
isFilterLoading = false;
});
});
return SafeArea(
child: FormBuilder(
key: _formKey,
child: Container(
child: isFilterLoading != true
? Column(children: [
Padding(
padding: const EdgeInsets.only(),
child: Row(
children: [
TextButton(
onPressed: () {
_formKey.currentState?.reset();
},
child: const Text(
'Сброс',
style: TextStyle(
color: Colors.black, fontSize: 16),
)),
],
),
),
_myRangeSlider(),
_buildFilterField(filterData),
Padding(
padding:
const EdgeInsets.only(top: 10, bottom: 10),
child: SizedBox(
child: ElevatedButton(
onPressed: () {
_formKey.currentState!.save();
filterValues = _formKey.currentState!.value;
setState(() {
String encodedString =
filterValues.keys.map((key) {
return key +
'=' +
Uri.encodeQueryComponent(
filterValues[key].toString());
}).join('&');
filters = encodedString;
page = 1;
list.clear();
productFuture = getProducts(val, filters);
});
Navigator.pop(context);
},
child: const Text(
'Показать результаты',
),
),
),
),
])
: const Center(child: CircularProgressIndicator())),
),
);
}));
Widget _buildFilterField(Map<String, dynamic> field) {
List<Widget> children = [];
print(filterValues);
field.keys.forEach((key) {
if (field[key]["type"] == 'radio') {
children.add(FormBuilderRadioGroup(
initialValue: filterValues?[key] ?? field[key]["initial_value"],
name: field[key]["value"],
decoration: const InputDecoration(
border: InputBorder.none,
),
options: [
for (var option in field[key]["data"])
FormBuilderFieldOption(
value: option['value'],
child: Text(
option['text'],
)),
],
));
}
});
return children.isEmpty
? Container()
: Column(
children: children,
);
}