App Version: 69.0.3497.50 beta
iOS Version: iOS 10.3.3,11.4 only
Device: iPhone6, 7+

Steps to reproduce:
1. Launch Chrome 
2. Tap on GLIF 
3. Send the app to background and Relaunch chrome

Observed results: 
Google Doodle animation is not smooth

Expected results: 
Google Doodle animation should be smooth.

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/1EPqBaFvsN4736JrYihKQdnTEgV0EWm00/view?usp=sharing