Our app works with Shopify tags, so when you perform the search, the app directs you to the /collections/all page with products filtered by this tag. In turn, Shopify performs filtering using the GET parameter, and when the collection URL contains the tag, the filtering isn't performed. As a result, those filters in the sidebar do not appear.
According to the Shopify documentation, the standard product filtering feature won't work with tags. As a result, filters do not work on collections/all/tag pages. Unfortunately, we can't affect this