Ouch! After 30 seconds, your search is still running. You could solve that in a few minutes with WPSOLR PRO.
Category page query engine
ok. But why do you want to keep your own filters exactly ? You can get better (from a quick look) with WPSOLR PRO (sliders, select2 mono/multi choice, and/or, ajax ….)
WooCommerce admin Order
Can you send me a screenshot ? WPSOLR PRO can replace the order backend search too (search in anything quickly, like billing addresses).