PNG files not showing in Panel preview

On my local MAMP server, when uploading png files via the file section there is no preview of the PNG file. Other image types work as normal.
When the website is on a live web server. Uploading a png works as normal and does show a preview of the file. Any idea what this might be?

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I’m having the same problem, same scenario, when uploading to a local build running via MAMP, .png previews seem to be broken.


Can you reproduce this in a fresh Starterkit as well with the same file?