UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36

Example URL:
https://www.google.com/advanced_search

Steps to reproduce the problem:
1. Type in content editable.
2. Change focus to a different content editable and type in it.
3. Press Ctrl+z twice.
4. The text in the second content editable will be undone and the text from the first.

What is the expected behavior?
Only the text text in the currently focused content editable will be undone.

What went wrong?
On pressing Ctrl+z the second time, focus was moved back to the first contenteditable and the text was undone.

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 62.0.3202.94  Channel: n/a
OS Version: 
Flash Version: 

Here is a video:  https://screencast.googleplex.com/cast/NTgyOTkzMzQ5NDQzNTg0MHw2NjI0N2E3ZS0zMg