Need for support: no min max price query param

Hello,

From recently I’ve been using your plugin and found about it as the best of those filtering addons for WooCommerce, thank you.

Now, after several advanced changes in WordPress script and styles processing I’ve almost succeeded in optimizing, albeit found that filtering prices is not working as it was, that is the query url is empty with out param values
?min_price=&max_price=&filter_ ..

Please advise as what .js scripts are appending prices values to query? By adding values manually(browser input query) the price filtering is working, so please explain how to modify?

Regards