I notice that, since last update, an image that's translated in the Media Translation, when used in a page, then translated in the CTE won't be translated anymore. The original image is served instead of its translation in the translated page.
It appears that the issue persists in a minimal environment.
However, it took me some time, but I also noitced that the issue only seem to occur with SVG media files. SVG files, translated in the media translation, aren't translated anymore in the translated posts where they are added.
Removing, then reuploading the translation again, or uploading a new SVG file in orignal language then translate it, working on brand new content. Nothing works as long as we play with svg files.
However, it works like a charm with existing PNG medias and new ones.