Error when uploading a 512x512 icon to Snap Store

When editing a store listing if you click “Show icon restrictions” it says that the max resolution for an icon is 512x512. When I uploaded a 512x512 icon no error was thrown but my icon on the web version of the store (it was fine in the Ubuntu Software Center) appeared as some sort of petal image:

On the store listing and branding page in the docs it says the max size is 480x480. Uploading a 480x480 icon fixed the issue for me.