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Issue 598084 link

Starred by 2 users
Status: Duplicate
Merged: issue 588434
Owner: ----
Closed: Mar 2016
EstimatedDays: ----
NextAction: ----
OS: Mac
Pri: 2
Type: Compat



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canvas will randomly disappear

Reported by heyimla...@gmail.com, Mar 25 2016 
UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36

Example URL:

Steps to reproduce the problem:
1. load the url in a new tab.
2. keep the tab open, open new tabs, browse around the web, do other things on your system for 20 to 30 minutes
3. Click back on the tab and the canvas's may be gone, sometimes you need to click the page or highlight text for them to disappear.

What is the expected behavior?

What went wrong?
Canvas is disappearing 

Does it occur on multiple sites: N/A

Is it a problem with a plugin? N/A 

Did this work before? N/A 

Does this work in other browsers? N/A 

Chrome version: 49.0.2623.87  Channel: stable
OS Version: OS X 10.10.5
Flash Version: Shockwave Flash 21.0 r0

https://bugs.chromium.org/p/chromium/issues/detail?id=141112
Screen Shot 2016-03-23 at 3.29.14 PM.png
68.6 KB View Download

Comment 1 by gilman.c...@gmail.com, Mar 28 2016 

Confirmed this is a new issue and affects HTML5 Canvas (does not affect SVG graphics, for example).

Chrome 49.0.2623.87 / Mac OS X 10.11.3

Will try to find more explicit steps to reproduce but for now, steps are similar to what is reported above:
- Load a page with a Canvas-based drawing (i.e. a chart for CPU usage in AWS EC2 console)
- Open another tab in same browser window
- After some amount of time if you switch back to original tab, the chart is blank - you must toggle back and forth between tabs for chart to re-draw.

We have an internal application that uses Canvas for drawing charts and same issue. This application is redrawing the charts very frequently (multiple times per minute) - if you switch back to the tab and the chart(s) are blank, even the redraw events that are occurring in the application do not make the chart appear again. 

Additionally: this is absolutely a new bug - we have been using our internal application for over a year with the same user behavior (in which we have multiple tabs open). This bug appeared some time after March 13th as far as we can tell.

Comment 2 by rsesek@chromium.org, Mar 28 2016

Mergedinto: 588434
Status: Duplicate (was: Unconfirmed)
This should be fixed in a new version soon.

Comment 3 by heyimla...@gmail.com, Mar 28 2016 

I saw the other ticket shortly after I submitted this, thank you!
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