App Version: 66.0.3329.0 canary
iOS Version: 11.2.2
Device : iPhones 

Steps to reproduce : 
1. Launch chrome.
2. Perform any voice search (say:google.com)
3. Tap on GLIF icon at the bottom.

Observed results:
Grey patch is displayed below omnibox for few seconds

Expected results:
Grey patch should not be displayed

Number of times you were able to reproduce: 5/5
Bug reproducible after clean install: Yes
Bug reproducible after clearing cache and cookies: Yes
Bug reproducible on Chrome Mobile on Android: NA
Bug reproducible on Dolphin/Safari/Firefox: Safari : NA
Bug reproducible on current stable build (App Version, iOS Version): No in M63
Bug reproducible on the current beta channel build (App Version, iOS Version): No in M64 and 65

Link to video :
https://drive.google.com/file/d/1Dx8tHLfVqQ8YsmUjA0RCZVcxswqN2ska/view?usp=sharing