In Dwell (Horizon theme) tags results don’t display in the pop up search bar even though there are results for them (which get displayed when Enter is pressed). Problematic from a UX perspective as I don’t expect customers to press Enter if the pop up is displaying no results.
I totally understand that Shopify is trying to get everyone to move away from relying so much on tags but until they make metafields searchable there is a big gap to fill.
My client doesn’t have budget to spend on an additional search app and frankly this is just an oversight from the Shopify theme team.

