Incorrectly displayed products that are in stock in the Search for products block

When you enable the "Show only products that are in stock" option in the Product search block and search by Zoya brand (present in the product name), only 2-4 products are displayed. There are 18 items in stock. [file]20347[/file] [file]20348[/file] With other brands, the correct quantity will be displayed. Enter the full brand name in the Product Name search field. [file]20347[/file] [file]20348[/file] What is the reason? [file]20347[/file] [file]20348[/file] [file]20347[/file] [file]20348[/file] [file]20347[/file] [file]20348[/file] Test process: https://one-box.shine-bright.com.ua/319470/ [file]20347[/file] [file]20348[/file]