New Minecraft launcher icon has a solid color background instead of a transparent one

After installing the new Minecraft launcher and uninstalling the old one, the new launcher icon appears to have a solid-color background (black in my case) rather than a transparent one.

 

This is somewhat visible in the Start menu app list, but it is much more noticeable when attempting to make a desktop shortcut for the new launcher (both Start Menu and Desktop appearance cases attached).