It could point to some miscalculation or challenge since the past crawl. Understand that the declared canonical really should be the version in the web site you want Google to index and rank. Hreflang tag #1 would be the self-referencing entry in this case. And the worth on the rel attribute https://bookmarknap.com/story9046693/indicators-on-was-ist-canonical-tag-you-should-know