Just tested on iPad mini3 with iOS9.0.2 installed as well as FMGO 14.0.3
When you have a solution and hold the iPad in landscape, press a button that is supposed to lock orientation, it should rotate and lock in portrait view. However, if you run a script with this script step, the screen just flickers.
When you rotate the iPad to portrait, the flickering stops, but the lock never works.
This was working perfectly on the same iPad on iOS8 when I showcased the new feature at DevCon.
You can see it in this video....