Anything was however cached and if I manually attached ?nocache=1 to the property, it confirmed the uncached version. So I feel it was not becoming added automatically as a result of rule. Be aware that no-cache means "it might be stored but Never reuse just before validating" — so https://stephenxpesh.webbuzzfeed.com/38192563/the-smart-trick-of-camión-pluma-en-alcalá-de-guadaíra-that-nobody-is-discussing