CB-13987: (ios) Fix WKWebView doesn't layout properly at launch on iPhone X

diff --git a/src/ios/CDVWKWebViewEngine.m b/src/ios/CDVWKWebViewEngine.m
index e359b04..e6778c8 100644
--- a/src/ios/CDVWKWebViewEngine.m
+++ b/src/ios/CDVWKWebViewEngine.m
@@ -97,6 +97,13 @@
 
     // re-create WKWebView, since we need to update configuration
     WKWebView* wkWebView = [[WKWebView alloc] initWithFrame:self.engineWebView.frame configuration:configuration];
+
+#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 110000
+    if (@available(iOS 11.0, *)) {
+        [wkWebView.scrollView setContentInsetAdjustmentBehavior:UIScrollViewContentInsetAdjustmentNever];
+    }
+#endif
+    
     wkWebView.UIDelegate = self.uiDelegate;
     self.engineWebView = wkWebView;