Add this CSS to the custom CSS for the review template...

img.wppro_badge3_IMG_4 {
width: auto !important;
}

I'll get this fix in the next update as well.

Edit those download settings for that location make sure it has the location found like in this screenshot...

Then save it and try the download again. Tell me if you are getting any error messages. It just worked for me when I tried it.

It looks like you are using some sort of lazy loading plugin for images maybe? I'm seeing a perfmatters-lazy class and a  data-ll-status attribute in the html for the images that isn't part of my code. I'm not sure why it would work on desktop and not mobile. You would either need to contact the creator of the other plugin or their may be a way to ignore the images in the other plugins settings.

To filter by source for the review template then there must be some reviews on the Review List page for that source.

There are some functions on this page...

https://wpreviewslider.userecho.com/knowledge-bases/2/articles/1334-access-total-and-averages-with-shortcode-or-function

I fixed Airbnb download last night. It should now grab the avatars. You will need to remove the reviews and re-download.

The latest version of the plugin 12.4.4 will hide the images on the front end if they are broken links. The issue is that Google has started expiring the images after a while. I plan on saving them locally in the next version of the plugin as a work around.

That would be some of the site CSS overwriting the plugin. You can right-click on the arrow and inspect. Then look for the CSS. Then you can know what CSS you can add to the custom CSS section of the review template to fix. I can check it if you post the URL.

Can you post the URL?