Hmm, that’s odd. AFAIK the Uploads table should only reference the relative path, and not the full path to the image location. We had a couple of posts that ended up that way, but it was because the full path was referenced in the post, rather than using the image upload button or copy/pasting. Is this happening for all posts, or perhaps a subset that use the full domain, rather than the relative path?
Either way, something like this should work
remap https://forums.jag-lovers.com//jl-discourse-uploads.s3.amazonaws.com //jl-discourse-uploads.s3.amazonaws.com
You may need to tweak the input string, as I am not sure if you’ll need the https:// or not, it’s best to take a look at either the Uploads table or the unbaked post to see what string your replacing.