Hi ​@Nhung_Nguyen, 

So, if I'm understanding correctly, you're talking about the blue square area with the two gray squares inside it that appears under the selected object, right?

We'd love to get a clearer picture of what you're experiencing. Would it be possible for you to share a video with us that shows your entire Figma screen? That way, we can try to reproduce it on our end and see exactly what's going on.

Also, could you let us know if this is happening only in the Figma Desktop app, in the browser, or both?

Thanks a bunch!