Hello,

This functionality you are referring to is how WooCommerce filtering works by default. It may not behave exactly as expected because WooCommerce handles filters in this way. Unfortunately, this is the standard functionality and not a bug in the theme.

Here you can check the same behavior on our test site.
https://blackpearlspro.com/woodmart_support/shop/

Also I have added the default woocommerce widget in the sidebar. You can check the same behavior with this.

Best Regards