Getting confirmation popup when trying to leave page after Saving Draft

[maddisondesigns]

Issue Overview

I created a new Page and added a Paragraph Block and an Image. I then clicked the Save Draft link. When I tried to exit back to the dashboard, I received a popup, warning that I might lose data.

I then clicked Save Draft again, and tried to exit the editor again, and still received the same popup. This kept happening no matter how many times I clicked Save Draft.

Steps to Reproduce (for bugs)

1. Create Page
2. Add content
3. Click Save Draft link
4. Select another menu option to go to another page in the Dashboard (i.e. Exit the editor)

Expected Behavior

Once I've clicked Save Draft and haven't made any further changes, I should be able to simply exit without any prompts

Current Behavior

Receiving popup warning of possible data loss if I exit the page.

Gutenberg 1.6.1
Firefox 56.0.2 (64-bit)
macOS Sierra 10.12.1

[pento]

Duplicate of #3296, fixed in Gutenberg 1.7.