useMutation status is always 'idle' and 'isLoading' always 'false' - react-query - reactjs

Question

So I use react-query to handle API requests. Current problem is that when i try to submit form data, post request, mutation state is always idle, and loading is always false. I also use zustand for state management.
This is useSubmitFormData hook. Post request executes as expected, just mutation status and isLoading does not get changed.
export const useSubmitFormData = () => {
const { postDataPlaceholder } = usePlaceholderApi();
// data which is submiting is getting from the store - reducer
const { data, filesToUpload } = useFormDataStore();
const { mutate, status, isLoading } = useMutation(() => postDataPlaceholder({ data }), {
onMutate: () => console.log('onMutate', status),
onSuccess: (res) => console.log(res),
onError: (err) => console.log('err', err),
});
return {
submitForm: mutate,
isLoading,
};
};
Now on FormPage.jsx it is triggered like this:
const { submitForm, isLoading } = useSubmitFormData();
const onSubmit = () => submitForm();
And this is how usePlaceholderApi looks like. It is kind of custom hook in purpose to use axios in combination with interceptors to handle authorization token.
const usePlaceholderApi = () => {
const { post } = usePlaceholderAxios();
return {
postDataPlaceholder: async (data) => post('/posts', { data }),
};
};
export default usePlaceholderApi;
And this is usePlaceholderAxios.
import axios from 'axios';
const usePlaceholderAxios = () => {
axios.interceptors.request.use(async (config) => {
const api = 'https://jsonplaceholder.typicode.com';
if (config.url.indexOf('http') === -1) {
// eslint-disable-next-line no-param-reassign
config.url = `${api}${config.url}`;
}
return config;
});
return {
get: (url, config) => axios.get(url, config),
post: (url, data, config) => axios.post(url, data, config),
};
};
export default usePlaceholderAxios;
Any ideas what could go wrong here ? Am I missing something ? Also tried to call axios directly in mutation, without usePlaceholderApi hook in between, but same outcome.