Gutenberg: Popup will appear asking me if I am certain to leave the article unsaved then disappears and leaves the article stuck open

[Actionerd]

Hi,,
First of all, I wanna say that I am using the latest version of Chrome, with Windows 8.1. I don't know if that happens with anyone else but :

Let's say that I wanna close a Window on Chrome or to rewind to a previous page from an article that hasn't been saved. A popup will appear asking me if I am certain to leave the article unsaved. With Gutenberg, the pop-up will appear, then disappear within the next seconds, letting me stuck on the article. I can't provide you with a screenshot of the problem, I am not fast enough.

[designsimply]

I tested with Chrome 68 on Windows 8.1 using the following steps and the popup works normally for me. Can you let me know if these are the same steps you are doing?

1. Go to Posts > Add New.
2. Add a title and some content.
3. Do not save.
4. Click the back button in the browser and check to see if the article gets stuck.

Result: I see a popup appear that says "Leave site?" and the pop up remains there until I click one of the options on the pop up.

Leave site?
Changes you made may not be saved.

Video: 29s
^{Seen at http://alittletestblog.com/wp-admin/post-new.php running WordPress 4.9.8 and Gutenberg 3.4.0 using Chrome 68 and Windows 8.1 via browserstack.com.}

If those are the right steps, can you try clearing browser cache and cookies as a basic troubleshooting step (if you haven't already) and try again.

[karmatosed]

Noting I deleted 2 comments saying the same thing and minimised 2 more saying again the same thing. Spamming and unacceptable behaviour towards anyone or this community will not be allowed in this repo. If you want to give feedback please do it without spamming or personal attacks.

My apologies for those who were effected during this. Please know we have a zero tolerance policy over this type of behaviour.

[Actionerd]

Thank you. After clearing Cache and Cookies, the problem disappear. It's back to normal.