UserAgent: Mozilla/5.0 (X11; CrOS x86_64 10895.33.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.58 Safari/537.36

Steps to reproduce the problem:
1. cleaner
2. 
3. 

What is the expected behavior?
proper behavior

What went wrong?
disappear,sticking, and the shakes

Did this work before? Yes about 3 month ago

Chrome version: 69.0.3497.58  Channel: canary
OS Version: 10895.33.0
Flash Version: 

This happens with and without wifi being enabled.