Why does this happen?

The screen shows half white and half black

Welcome to the community. Interesting display. I use Brave on a desktop and don’t know anything about Android devices, so really can’t help.

On a desktop you can go to brave://settings/appearance and change Brave colors. I think there is a similar setting on Android. You might want to try toggling through the various options and see if that solves the problem.

image

If it doesn’t, hopefully another community member with knowledge of Android can pop in and help.