Hi, same issue is also happening with other symbols like callAsyncJavaScript: func callAsyncJavaScript( _ functionBody: String, arguments: [String : Any] = [:], in frame: WKFrameInfo? = nil, in contentWorld: WKContentWorld, completionHandler: (@MainActor (Result<Any, any Error>) -> Void)? = nil ) It works fine for iOS 18.4 runtime, but fails with previous ones when looking for this symbol: swift demangle '_$sSo9WKWebViewC6WebKitE19callAsyncJavaScript_9arguments2inAF17completionHandlerySS_SDySSypGSo11WKFrameInfoCSgSo14WKContentWorldCys6ResultOyyps5Error_pGcSgtF' _$sSo9WKWebViewC6WebKitE19callAsyncJavaScript_9arguments2inAF17completionHandlerySS_SDySSypGSo11WKFrameInfoCSgSo14WKContentWorldCys6ResultOyyps5Error_pGcSgtF ---> (extension in WebKit):__C.WKWebView.callAsyncJavaScript(_: Swift.String, arguments: [Swift.String : Any], in: __C.WKFrameInfo?, in: __C.WKContentWorld, completionHandler: ((Swift.Result<Any, Swift.Error>) -> ())?) -> ()

Same issue with libswiftWebKit.dylib since day 24.03. Reported as FB16640444 Thank you!