It appears the images aren’t lost.
In this post: Marketplace versioning with embedded resource - #7 by Nadahar
You have addresses of images on S3 for example https://community-openhab-org.s3.dualstack.eu-central-1.amazonaws.com/original/3X/3/b/3bcdc6663c231a91b969c9eb89a208feccc74dc8.png and they still work, they just aren’t translated properly to these from the upload:// URI at the moment.
Maybe something like this: Missing images in discourse website. while they exist in upload folder - #5 by hosna - Support - Discourse Meta will help.