Bottom of touch screen not working when full screen is enabled

When playing any game in full screen, the bottom of touch screen (in portrait mode) is not working.
it’s exactly the place of the software buttons, like if the game was “under the buttons”.
does anybody have this problem too ?
how can i disable the fullscreen, or force the buttons to always be displayed ?

Did u ever solve this problem I’m having the same problem but its everywhere in the os not just in games