Unable to reproduce the issue on mac 10.13.3 using chrome reported version #69.0.3497.100 and latest canary #71.0.3566.0.
Attached a screen cast for reference.

Following are the steps followed to reproduce the issue.
------------
1. Opened Chrome in Fullscreen & watched video in full screen.
2. Exit full-screen video.
3. Typed Command+T for new tab, typed URL and observed that chrome displayed the searched url in full screen as expected.

riederbenedikt@ - Could you please check the attached screen cast and please let us know if anything missed from our end. Also please check the issue on latest canary #71.0.3566.0 by creating a new profile without any apps and extensions and please let us know if the issue still persist or not.

Thanks...!!

Deleted: 890269.mp4 2.7 MB

	890269.mp4 2.7 MB View Download

Thanks for trying, that was exactly how the issue was produced for me (before filing the report, I was able to reproduce it this way, no matter if with or without extensions etc.). Nevertheless the issue seems to have disappeared, I am also not able to reproduce it anymore. ¯\_(ツ)_/¯

So, all left to say is thanks for the very quick reply/triage...  

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

I am also experiencing this same (or similar) issue, I think the difference is I initiated a new tab with cmd + t while still in full screen mode.
Chrome then jumps to the new tab ( as expected ) but all inputs are non intractable with keyboard inputs. Attached is a video

---
Google Chrome	69.0.3497.100 (Official Build) (64-bit)
Revision	8920e690dd011895672947112477d10d5c8afb09-refs/branch-heads/3497@{#948}
OS	Mac OS X
JavaScript	V8 6.9.427.23
Flash	31.0.0.108 /Users/*/Library/Application Support/Google/Chrome/PepperFlash/31.0.0.108/PepperFlashPlayer.plugin
User Agent	Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36
Command Line	/Applications/Google Chrome.app/Contents/MacOS/Google Chrome --flag-switches-begin --javascript-harmony --flag-switches-end
Executable Path	/Applications/Google Chrome.app/Contents/MacOS/Google Chrome
---

Deleted: chrome_bug2.mov 8.6 MB

	chrome_bug2.mov 8.6 MB View Download

riederbenedikt@ - As per comment #4, please let us know if the issue can be closed.

Thanks...!!

I still sometimes experience the exact same issue as aaronf...@ (comment #7), also with a blank new user without extensions etc., but I am not able to reliably reproduce it. Since aaronf...@ is also reporting the same issue (and could reproduce it, see #7 video), you can maybe have another look at what could probably cause it. 

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

weili@: I can also take this as part of my other fullscreen work, if you want.

As per comment #9, the issue seems to be not reproducible consistently and also the issue is not reproducible from TE-end as per comment #3. Hence, removing the Needs-Bisect label and requesting someone from UI>Browser>FullScreen team to please have a look into the issue.

Thanks...!!

Mac triage: assigned to weili@ for fullscreen investigation.

We were unable to reproduce this bug on Mac with chrome #72.0.3610.0. If this bug still reproduces for you, 
please reopen or file a new issue. Thanks!