When you add hreflang tags, guarantee they all point to indexable and crawlable pages. Verify which tags are causing the issues and rectify them by making sure the pages they’re pointing to are Are living.  If none of these are typically applied, Google will depend on other signals like hreflang, https://addons.prestashop.com/en/seo-natural-search-engine-optimization/31857-automatic-google-rich-snippets-json-ld-open-graph-seo.html