RESOLVED CONFIGURATION CHANGED 244120
iOS 15.6 Some WebGL-enabled pages freeze when taking screenshots 
https://bugs.webkit.org/show_bug.cgi?id=244120
Summary iOS 15.6 Some WebGL-enabled pages freeze when taking screenshots
Alexander
Reported 2022-08-19 04:54:54 PDT
This issue is reproduced on iOS 15.6 for some Verge3D applications. E.g: The app which crashes https://cdn.soft8soft.com/demo/blender/metaballs/metaballs.html The app which does work https://cdn.soft8soft.com/demo/blender/spinner/spinner.html When taking screenshots using Side button + Volume up (iPhone 13+) or Side button + Home button (earlier iPhones) the browser freezes completely. The bug appears to be not connected with Verge3D specifically.
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Sam Sneddon [:gsnedders]
Comment 1 2022-08-19 09:15:03 PDT
Looking at the stacks, seems kinda similar to bug 237674, insofar as the UI process is blocked on -[_WKWebViewPrintFormatter drawInRect:forPageAtIndex:] + 116 (_WKWebViewPrintFormatter.mm:95).
Radar WebKit Bug Importer
Comment 2 2022-08-19 09:15:17 PDT
<rdar://problem/98885447>
Sam Sneddon [:gsnedders]
Comment 3 2022-08-19 09:26:08 PDT
Far as I can tell, this doesn't reproduce on iOS 16 Beta, so I'm assuming this was fixed elsewhere.
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