App Version: 70.0.3529.0 Canary
iOS Version: iOS 10.3.3,11.4
Device: iPhones 7+, 8+

Precondition :
1- Have few accounts saved in SSO 

Steps to reproduce:
1. Launch Chrome 
2. Tap on the tab switcher icon
3. Scroll the cursor to recent tabs.
4. Tap on “Not as username@gmail.com” 
5. Send the app to background.
6. Open New Tab from 3D Force touch or today's view.

Observed results: 
App Freezes 

Expected results: 
App should not freeze

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 the current beta channel build : No in M68
Bug reproducible on the current beta channel build : Yes in M69

Link to video/image: 
https://drive.google.com/file/d/1frtNIFZocYHxgpitDEoGs6qZ4bnGBWzW/view?usp=sharing