App Version: 63.0.3239.33 beta
iOS Version: 11.2, 10.3.3
Device: iPhone7 plus, iPad Air2
URL: www.google.com

Proposed Priority: P3
Found-in Label [i.e found-in-m4x]: 
Other applicable labels:

Steps to reproduce:
  1. Launch Google Chrome
  2. Type "What" in omnibox and search
  3. Once the results page is loaded, tap the close icon to clear text in the search of google.com page (Not in the omnibox)
 4. Perform new search "When" and wait for the results to load completely.
 5. Tap browser back button

Observed results: Observe that results page is updated but the text inside the Google.com search query still show "what"

Expected results: Text query from google.com search box should be updated correctly.

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: Not tested
Bug reproducible on Safari/Firefox: Firefox: NO, Safari: NO (Updated correctly)
Bug reproducible on current stable build (App Version, iOS Version): M62 Yes
Bug reproducible on the current beta channel build (App Version, iOS Version): M63 Yes

Link to video: https://drive.google.com/file/d/1dX-saeMQwV2qMwQ9M9MSJ9yMlLLG3pNe/view