Thanks for filing the issue...

Unable to reproduce the issue on reported chrome version 70.0.3538.110 using Windows 10.
Steps: 
---------
1. Launched reported chrome 
2. Opened Dev tools >> Sources > Watch 
3. Clicked on + and Added the watch ['a','b'] and clicked on the RightArray key.
As we have observed that watch displaying as expected 

@Reporter: Request you to retry this issue with fresh profile without any extensions & apps or reset all the flags and verify this on chrome beta 71.0.3578.75, you can download latest chrome builds here:" https://www.chromium.org/getting-involved/dev-channel ". Let us know whether issue still persists.

Thanks..!

Deleted: 910138.mp4 1.9 MB

	910138.mp4 1.9 MB View Download

Step 2 of my repro is "Press the RightArray key". That means press the RightArrow key on the keyboard. You wrote, "clicked on the RightArray key". It sounds like you used the mouse to click the arrow on the screen.

Using the mouse works for me, too. The problem is with keyboard support. After typing in a watch, it's common to want to expand its results right away. Your hands are already on the keyboard, so it's efficient and ergonomic after pressing Enter to add the watch to press the RightArrow key to expand its results, rather than reach for the mouse.

It looks like the Developer Tools were built with keyboard support in mind, but it's not working in this scenario.

Thank you for providing more feedback. Adding the requester to the cc list.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Joel, could you please take a look.

It looks like the complaint is that the watches pane is not keyboard navigable. Seems to be related to the console keyboard navigation effort.