Either your canonical tags are setup incorrectly or Google has selected to disregard the desired canonical. For anyone who is using a CMS like WordPress, Joomla, or One more System, there are sometimes settings or plugins to deal with HTTPS redirection and canonical tags: On the subject of Shopify merchants, https://esocialmall.com/story4194974/the-smart-trick-of-was-ist-ein-canonical-tag-that-nobody-is-discussing