Assign volume keys in Phantom Hourglass.

[Kalameet]

Hi.
I own a Moto G and DraStic runs fine. I'm playing Zeld:PH, so long I had no problems, and the gameplay is perfect thanks to the customizable screens and controls.
However, I found a minor issue, and I would like to know if there is some way to fix it, or I'm just doing something wrong.
I assigned the volume up/down key to L or R buttons (in Phantom Hourglass you press L or R to quickly use the equipped item, intead of tapping the screen). And when tried to use it with the bumeran, the only item I got so far, it seems to work, the item is highlighted and I can trace the route for the bumeran in the screen... But when I release, nothing happens, like if the action was cancelled.
I tried this using the L/R buttons in the virtual pad instead, and that way works just fine.

Thanks in advance

[Kalameet]

I can confirm that this also happens with the shovel and bombs. Maybe the emulator does not support using both touchscreen and phisical keys at the same time?