Unknown Element Visible in play in editor

[Rimohd]

Could you recgonize the weird transparent circles as in the image and help me how to get rid of that ?

[ClockworkOcean]

How do I hide on-screen buttons on android devices?

I made mobile game and it works great on my phone, but my friend’s phone has these menu buttons at the bottom of his screen that don’t go away. I was wondering if there was any way to hide these buttons, and if so is it possible to do so through blueprints? Thank you