[Webkit-unassigned] [Bug 237113] REGRESSION (iOS 15.4 beta) - WebGL yields incorrect results when using preserveDrawingBuffer on iOS 15.4 Beta

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=237113

--- Comment #11 from Kenneth Russell <kbr at google.com> ---
This is almost surely a regression in the MTLStoreAction used to resolve the multisampled framebuffer; the multisampled contents have to be preserved after the blit to resolve, unless discarded. Can this be investigated from that standpoint?

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