Hi there,
Cornerstone has no rewrite capability, all URLs are provided by Wordpress system especially the media library. I tried it in a test page and image’s URL is correctly added with HTTPS. But please note that already added images (static URLs) will not rewrite itself after you switch your site to HTTPS, you have to do it manually, hence, it’s only normal to see non-secured URL on existing pages (pre-HTTPS pages).
Let’s do some recap, the issue you’re having is images being added with HTTP instead of HTTPS, right? Would you mind providing a video recording of how we could reproduce this issue? I tried this and all images are inserted with HTTPS.
About the MIXED content issue, I can still see them, the URL is needed to be replaced. Should I do that? They are the 3 images in your topbar, the flags in your menu items, and images in the content. You can follow this list for string replacement
http://www.evergreen-hakuba.com/wp-content/
to https://www.evergreen-hakuba.com/wp-content/
http://www.evergreen-hakuba.com/en/wp-content/
to https://www.evergreen-hakuba.com/en/wp-content/
http://www.evergreen-hakuba.com/jp/wp-content/
to https://www.evergreen-hakuba.com/jp/wp-content/
http://www.evergreen-hakuba.com/cn/wp-content/
to https://www.evergreen-hakuba.com/cn/wp-content/
What you need is just replacing the URL of images, hence /wp-content/
. And make sure you disable your cache plugin too, and since it’s SiteGround, please make sure it’s built-in cache feature is inactive. Some optimization may have database caching, maybe what we’re replacing is the cache version of your database. Maybe not, but we need to make sure there is no optimization since cache is against change.
Thanks!