UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36
Platform: Coral

Example URL:

Steps to reproduce the problem:
1. Connect external monitor and set as clone mode.
2. Open paint.html
2. Draw line on internal touchscreen,
3. Find external monitor line will interrupt.

What is the expected behavior?

What went wrong?
10780.0.0 image start this issue.

Did this work before? N/A 

Is it a problem with Flash or HTML5? N/A

Does this work in other browsers? N/A

Chrome version: 69.0.3464.0  Channel: dev
OS Version: 10799.0.0(Official Build)
Flash Version: 

Contents of chrome://gpu:
 

Deleted: Touch_show_abnormal.mp4 1.8 MB

	Touch_show_abnormal.mp4 1.8 MB View Download