Comment 73 for bug 729979

I can fully reproduce it with any window (Unity 5.14.0, Compiz 0.9.7.8 - default settings) following these steps:

1) Minimize any window
2) Super+W (to show Scale)
3) Super+W (to hide it)
4) Click on the application icon in Launcher or browse to it using Alt+Tab / Alt+|

Notes:
- Minimizing the blank window and using Scale reverses it.
- This issue does not happen when the app has 2 or more windows (which,again, triggers Scale)

I hope this helps (=