Copying an application then creating a new document in Preview does not retain the icon as expected

[hisaac]

Submitted via email by Bernard:

In order to illustrate the magazine, I need icons of applications.
To get them, I use the classical [cmd] [c] on the application, then open Preview (Aperçu in French) then press [cmd] [n] to create a new document from the pasteboard…
When Plain Pasta is active, I get nothing in that new Preview window !
When Plain Pasta is not running, everything works normally.

I am able to reproduce the issue. Strangely, the issue does not occur when running the app through Xcode. It only happens when running the release version. More investigation is needed.