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We’re encountering an issue with WKWebView on the latest iOS 26 beta. When loading a PDF URL, the background behind the PDF now appears as dark gray, instead of the expected white. Environment: Device/Simulator: iOS 26 Component: WKWebView Behavior: PDF background renders as dark gray Expected: White background (as seen on all earlier iOS versions) We confirmed that the exact same PDF and code render correctly (with a white background) on iOS 25 and earlier, so this appears to be new in iOS 26. Questions Is this an intentional change to PDF rendering inside WKWebView on iOS 26? If so, is there a new API, property, or configuration option to control the background color of the PDF viewer? Is there any known workaround to force the background to remain white? Any information or guidance would be greatly appreciated. Thank you!

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