The latest version of the Windows launcher (netbeans64.exe), on the master branch per September 16, opens a new console window every time NetBeans is launched from a shortcut or by double-clicking on the executable in Explorer. The console was suppressed in earlier versions.
I think this applied to the platform application launcher as well (app64.exe) when I tested two weeks ago.
This bug was present before the unrelated changes in
NETBEANS-1227 ( https://github.com/apache/incubator-netbeans/pull/573 ).