A filter promises in stock under 500, and the product page shows 549. The listing tile shows one price, the product detail shows another. New products go live but the search index is not updated until the next day, so they sit invisible during the demand window.
Every surface reads from a different source at a different time, and nobody owns the agreement between them. Thin or duplicate product copy across markets kills rankings. Peak demand windows pass while new products remain unlisted in search.