How can I fix the product filter issue in the Dawn theme?

Installed Dawn theme on one of my store…on Collection product listing page added product filters. Unable to locate how to show Apply Filter button..right now its working like if I select some checkbox form Vendor it filters out immediately this is some how works but same is with price filter…just entering a single digit filters products like if I need to search from $20 to $50…I enter just 2 in from input field and it filters out the products. Any idea how to fix it?

Thanks