My game has a white border that indicates the default Android navigation border, but in several applications this border is hidden. But some applications and games do not hide, for example MyBoy (on my cell phone) which makes it more susceptible to bugs, my Tales of Androgyny game during combat always closes by itself. I already lost ironman saves and progress because of this bug, my phone has Android 9, 4GB Ram, 64 Storage and a processor that runs heavy games at medium/performance 60fps. The bar I'm talking about is the one in the image below.

The screen is 6'4 Inches, when I change the app's proportions it goes to one in a smaller dimension.