In additon to elisolution's remedy previously mentioned, this also checks no matter whether we are literally on the home page (not only whether or not the canonical was set or not). I analyzed this Answer a little bit and as far as I'm able to see, it really works as expected. https://addons.prestashop.com/nl/seo-zoekmachineoptimalisatie-vermelding/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html