May you check how it works when the layout is disabled? If it works in the save way, please check how the search works on the default theme and let me know.
I have checked that issue on the default theme, and there is the same issue – https://prnt.sc/8sYmYzO868Il so this is something related to WooCommerce itself.
I suggest you contact their support team for further solutions.
You are welcome! If you do not mind, can you please leave a 5 stars rating for our theme by going here: http://themeforest.net/downloads It will allow us to release more updates and provide dedicated support in the future. It would encourage our work a lot.