Chrome Version:69.0.3457.0/10783.0.0 dev channel Peppy,Kip,Celes
OS: Chrome OS

What steps will reproduce the problem?
(1)Sign into user >> Observe wallpaper color >> launch chrome,open NTP
(2)Press'Search' key continuously to pop-up App launcher and observe the tab strip flickering with background wallpaper color

Actual:Glimpse of background wallpaper color is seen at tab strip while opening & closing App launcher
Expected: No such glimpse of background wallpaper color should be seen at tab strip while opening & closing App launcher

This is a Regression issue seen from as same is working fine in M-67.0.3396.78/10575.54.0 

Note: 
1.Issue is not seen in Linux,Windows OS
2.Issue is seen in M-68 beta

Attached the screencast for reference..



 

Deleted: Actual.mp4 14.2 MB

	Actual.mp4 14.2 MB View Download