Same site embed looses floating toolbar on blur

[marcosignacio]

Description
Same site embeds looses floating toolbar on blur

Step-by-step reproduction instructions

1. Create a new post (besides defaults Hello World).
2. Copy that post's link.
3. Edit "Hello World!".
4. Add some paragraphs.
5. Insert embed. Paste (2) link.
6. Click on title or other paragraph.
7. The embed toolbar disappears, and doesnt show again even clicking inside embed box.

Actual behavior
The embed toolbar disappears on blur.

Screenshots or screen recording (optional)
https://user-images.githubusercontent.com/3832861/122485760-121bc100-cfae-11eb-8788-0f9c77abb353.mp4

Code snippet (optional)

WordPress information
WordPress version: 5.7.2
Gutenberg version: default
Are all plugins except Gutenberg deactivated? yes
Are you using a default theme (e.g. Twenty Twenty-One)? Yes, Twenty Twenty

Device information
Device: Desktop
Operating system: Windows 10
Browser: Chrome 91

[hideokamoto]

Hi @marcosignacio.

Can you check the error log in your browser?
If using Google Chrome, we can check the log refer to the document.
https://developer.chrome.com/docs/devtools/console/log/

If you find any error message, please copy and paste here.
We can check it whether related to the issue or not.

[talldan]

I can reproduce this. The scrollbar does seem to appear as soon as the cursor is moved outside of the embed block after selecting it. There doesn't seem to be anything of relevance in the console.