1. My object eraser works perfectly.
2. I don't have an app/ system app called object eraser. It's just the Labs setting in the gallery. So now I guess I'm not sure what the original problem is. 😃
If you are having an issue with the Object Eraser app, to solve the problem, you need to delete apps related to Object eraser.
※ How to delete apps related to Object eraser
Settings -> Apps -> Search( Keyword : eraser)
1) Delete 'Object Eraser' app
2) Delete 'Reflection Eraser' app
3) Delete 'Shadow Eraser' app
We appreciate your contribution to the Beta Program.
One UI Beta Team
Sure enough, it wasn't working.
Did follow the steps provided by devs.. and it's working as it should.
Thank you guys @ development..