Brands(with checkbox) and product category

Hi there,
I have two issues on my website.

The checkbox in the brand filter is not showing . For example, when I add a product category filter and a WooCommerce brand navigation filter, they work fine. Previously, the brand filter had checkbox selections, but after deleting and re-adding them, only the category is showing, and the checkbox selection is missing. I want the checkbox selection to appear again.

When I search for a specific product category, the filter sidebar disappears. I don’t want it to disappear.”