Buttons' touch areas are off on shield k1 on custom screen size

Nvidia shield k1 allow users to change screen size to optimize app. This is a per app setting. Newly installed app aren't optimized by default and run at 1920x1080. When a (lower) new screen size is set for mcpe (to save power) the GUI fits perfectly the new screen size, but touchable areas on the screen are off (positionned for a 1920x1080 screen size) The game is then impossible to play when using touch control.

Device is Nvidia Shield k1
Affected versions: 0.15.7.2 and previous