Correction in manual regression and OS info:
Good build: 69.0.3464.0  (Revision: 567919).
Bad build: 69.0.3465.0 (Revision: 568285).

Note : Will soon update the behaviour of Mac OS once Mac build #69.0.3465.0 will be available.

You are probably looking for a change made after 568366 (known good), but no later than 568367 (first known bad).

CHANGELOG URL:

The script might not always return single CL as suspect as some perf builds might get missing due to failure.

https://chromium.googlesource.com/chromium/src/+log/f5bebe74a5f13088f584e6f49a04b9be04527302..10bcd527688d87ddb447377a85e81a46289d5774

Suspect : https://chromium.googlesource.com/chromium/src/+/10bcd527688d87ddb447377a85e81a46289d5774

From the CL above, assigning the issue to the concern owner 

@sinhak- Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.

https://chromium.googlesource.com/chromium/src/+/10bcd527688d87ddb447377a85e81a46289d5774 has only Chrome OS specific changes and even those do not touch any UI components.

Not sure of the root cause of the bug.

As this is a recent regression adding release blocker label for this issue.Please reduce priority or remove if not the case.

Thank You!

Just FYI: I don't think this CL is even part of the build? https://chromium.googlesource.com/chromium/src.git/+log/69.0.3465.1/ was created 10 hours before my posting this but https://chromium.googlesource.com/chromium/src.git/+log/10bcd527688d87ddb447377a85e81a46289d5774/ landed 6 hours ago?

Sorry for spamming but how exactly did you bisect to this revision? https://storage.googleapis.com/chromium-find-releases-static/10b.html#10bcd527688d87ddb447377a85e81a46289d5774 does not have any release corresponding to it (yet). You probably need to check your bisect script.

With respect to comment #5 & 6:
We got all the good builds from the bisect tool in the below mentioned revisions :

Good build: 69.0.3464.0  (Revision: 567919)
Bad build: 69.0.3465.0 (Revision: 568285)

Hence we increased the Bad revision range (Revision: 568385) and got the combinations of Good and Bad builds in the bisect tool.

Update :
Again rechecked this issue on Windows (7,8,8.1,10),Linux (14.04 LTS) OS using the reported build #69.0.3465.0 and unable to reproduce the issue today.
 
Attaching the screen cast for the same.

Deleted: 69.0.3465.0_Behavior.mp4 374 KB

	69.0.3465.0_Behavior.mp4 374 KB View Download

Mark it as WontFix as per comment#7 provided by reporter.Feel free to raise a new issue if sill facing.

Thank You!