UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36

Steps to reproduce the problem:
1.Run attached html file in browser
2. After three click on canvas, you will observe scale get lost.
3. Comment " context.getImageData(1, 1, 1, 1);" at line 34,then run you will observe context scale will retain

What is the expected behavior?
Context scale property of canvas should not get lost for any number of left click

What went wrong?
Context of canvas get lost after three left click. You will observe that on text displayed

Did this work before? Yes chrome 63

Chrome version: 64.0.3282.140  Channel: stable
OS Version: 10.0
Flash Version:
 

Deleted: index.html 1.2 KB

index.html 1.2 KB View Download