Panel image preview and re-ordering slow for large images

I have a client that uploads quite a lot of large size images to their Kirby pages. The images are typically 1mb+ and usually number between 15 and 20.

With around 25 images between 1.5 and 2.0 mb each the re-ordering becomes very slow and doesn’t render properly.

It seems that the image previews are the full-sized image rather than a scaled thumbnail and I wonder if this is causing the problem?

we are currently working on a solution for this.