Issue exporting app icons from the Apple photoshop template

Using the App Icon template "macOS 11 (Beta) Download for Photoshop" from the design resources page I've made an updated set of icons with the new Big Sur styling for my app.

However, when I use the generate > Image Assets feature all of the icons are generated as 2040 × 1989 (the dimensions of the template) with the icon in it's relative position from the template.

Is there a way I can get photoshop to export the icons at their intended sizes rather than the size of the template?

Edit: I am using Photoshop version 21.2.3 (the latest version available on Adobe Creative Cloud)
Same problem here. Have you found a solution yet? I've searched the net and have not found a answer that works.
I have not found a solution.

I downloaded the file fresh and used generate assets on it as it comes direct from Apple and this still had the issue - I have filed a radar (FB8755043).
Same problem. Any solution?
Issue exporting app icons from the Apple photoshop template
 
 
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