sort_by is being ignored when getting search results

Description

Okay So first thank you for this software solution, you guys are amazing!

but I'm facing a certain issue that is not fatal yet necessary for my application. I'm using Typesense with Firebase cloud functions (created a cloud function with the Typesense JavaScript code which ill post now). The Search function is working perfectly and well, but when I try to add a "sort by" option to the search parameters, the sort by is getting completely ignored, actually, I tried using filter by too, and was ignored too with no Error code or any signs of failures. I do not know what to do, to be honest. Please help

Cloud function with the Typesense Function:

const Typesense=require('typesense');

const functions = require("firebase-functions");

let client = new Typesense.Client({
'nodes': [{
'host': 'xxx', // where xxx is the ClusterID of your Typesense Cloud cluster
'port': 'xxx',
'protocol': 'https'
}],
'apiKey': 'xxx',
'connectionTimeoutSeconds': 10
})

exports.returnSearchResults =functions.https.onRequest(async (request, response) => {
if (request.method === 'OPTIONS') {
response.set('Access-Control-Allow-Headers', "authorization,content-type");
response.set('Access-Control-Allow-Origin', '');
response.status(204).send('');
}else{
let search = {
'q' : request.body.query,
'query_by':"tags,productName,productDescription",
"page": request.body.page,
"per_page": request.body.documentLimit,
"sort_by":"productAvailableQuantity:desc" ,
}
client.collections('Products')
.documents()
.search(search)
.then(function (searchResults) {
response.set('Access-Control-Allow-Headers', "authorization,content-type");
response.set('Access-Control-Allow-Origin', '');
response.status(200).send(searchResults);
})

}

});

Expected Behavior

The expected behavior is that the products with the most available quantity should appear first

Actual Behavior

The actual behavior is that the sort_by is completely ignored.

Typesense Version:

Server: 0.24.1
typesense-js: 1.5.3

OS:

Mac

Start by reproducing the search request from the provided Firebase Cloud Function using Typesense Server 0.24.1 and typesense-js 1.5.3. Investigate why the sort_by and filter_by parameters are ignored; done means the expected parameters affect returned results or the request produces a clear error.