BarcodeScanner black bar at bottom in camera

[rajras]

In android, and in particular in some Huawei devices for example:

• Huawei Mate 9 Lite
• pantalla de 5,5 pulgadas
• 1080 x 1920 px
• 400 dpi

We are having some issues with the camera. A black bar is showing at bottom. i'm attaching an image as an example.

Do you have any ideas about what could happend in this case, and why this is only in some devices ?

thanks in advance...