This is starting to annoy me.
I upgraded my Samsung S10+ phone to One UI 3.0 and while the interface is much smoother, and the video ringtone was a really good addition, there is one very inexplicable addition that really annoys me.
When playing a full screen game sometimes the home button bar commands can be activated without the home bar actually becoming visible. This is very annoying considering full screen games can have important commands in the position where the navigation buttons are and the navigation buttons can cover these commands even when they are deactivated in Game Mode.
I am not entirely sure if it is a glitch or it is an intentional addition. Either way, I doubt anyone asked for this and it should be removed.
Video of this glitch/error: https://youtu.be/QM1yUpl5wrA