[Webkit-unassigned] [Bug 238135] New: WebGL canvas suddenly turns black

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=238135

            Bug ID: 238135
           Summary: WebGL canvas suddenly turns black
           Product: WebKit
           Version: Safari 15
          Hardware: Mac (Apple Silicon)
                OS: macOS 12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebGL
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Daniel.balog at hexagon.com
                CC: dino at apple.com, kbr at google.com, kkinnunen at apple.com

The application at the following URL: 

https://dev.luciad.com/portal/packed-samples/panoramics/panorama/index.html?webgl&reference=epsg:4978

Seems to be broken since the new Safari 15.4 upgrade, as far as I can tell. If you open this page, and move the mouse around a bit, the screen will go black. There's no clear errors on the console. I'm not sure how to debug this. 

You can temporarily "fix" the application by resizing the window. But moving the mouse will cause it to turn black again.

In Chrome and Edge, the application works as intended, even on the same hardware.

I'm running an M1 MacBook Pro with all the latest software updates.

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