#115 was a step in a right direction (prefer first results), but it seems it is not the whole solution, as empty results should not be prioritized.

E.g. on https://www.triganostore.com/tente-de-camping-raclet-bora-4.html there are two og:description values, the first one is empty. https://developers.facebook.com/tools/debug/sharing/?q=https%3A%2F%2Fwww.triganostore.com%2Ftente-de-camping-raclet-bora-4.html shows that a non-empty one is extracted.