I have the same problem on Android devices. If I lock the screen and go back to the game it produces this wierd resize.
In addition to that there is a strange flickering between any layout change. It is readjusting but it takes a few frames. This looks really bad
Inspired by superkew's comment I fixed both problems by adding
"Every tick: system set canvas size to LayoutWidth x LayoutHeight"
to every layout. This works for me on Android devices but I am just optimising for 16:9, 15:9 and 16:10 resolutions. (Tested on Galaxy Tab 7 and Galaxy S2)
I would appreciate to use a working fullscreen letterbox scale with fixed flickering.
@ArcadEd: Do u have any Updates from Ludei?
Battle Wizard Attack on Google Play: goo.gl/9RebfZ