UserAgent: Mozilla/5.0 (X11; CrOS x86_64 9765.76.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.113 Safari/537.36

Steps to reproduce the problem:
1. sign in
2. 
3. 

What is the expected behavior?
chosen wallpaper is blurry before  sign in

What went wrong?
blurry wallpaper image on sign in but can sign in ok

Did this work before? N/A 

Chrome version: 61.0.3163.113  Channel: stable
OS Version: 9765.76.0
Flash Version: 

this is after the lasted update