Physical keyboard problem

Hi all,

I’ve got a bluetooth keyboard + mouse with a usb dongle connected to my phone (Alcatel Idol 4) through a otg adapter. It works great with other apps (like MagicDosBox), but I can’t get it to work with RetroArch. I’m trying to use it with Amstrad CPC, Commodore 64 and Sharp X68000 cores. Hotkeys gets recognized, but if I press the game focus toggle key it doesn’t works.

I also have a little problem with overlays. Selecting some of them makes RetroArch crash instantly. This doesn’t happens with my Samsung S2 Plus.

Hope someone can help me, thank you.