I have a problem with the featured images on my translated posts using WPML. I've only noticed it in the last couple of weeks. If I make a translation of a post from language A to language B, everything copies over ok (all the images and featured images), but the featured image in the new language B post can't be clicked, even though it is set to link back to the same post. This works on the original post (language A), just not on the translated post (language B)
I also realised that I can't change any of the featured image settings inside the post editing area. If I try to change the linking behaviour or the size it appears in a single page, the changes don't happen after updating. I haven't added any new plugins since you last checked the site. Maybe one of the plugin updates (to WPML or another plugin) is causing a problem, or maybe it's just a WPML setting I have wrong.
Maybe you can have a look later?