diff --git a/browser_patches/webkit/BUILD_NUMBER b/browser_patches/webkit/BUILD_NUMBER
index 3c7f1b2440..5fb867eb46 100644
--- a/browser_patches/webkit/BUILD_NUMBER
+++ b/browser_patches/webkit/BUILD_NUMBER
@@ -1,2 +1,2 @@
-1455
-Changed: yurys@chromium.org Tue 30 Mar 2021 02:36:32 PM PDT
+1456
+Changed: pavel.feldman@gmail.com Tue Mar 30 23:50:14 PDT 2021
diff --git a/browser_patches/webkit/embedder/Playwright/mac/BrowserWindowController.m b/browser_patches/webkit/embedder/Playwright/mac/BrowserWindowController.m
index 81cdec869b..28e8b29ad8 100644
--- a/browser_patches/webkit/embedder/Playwright/mac/BrowserWindowController.m
+++ b/browser_patches/webkit/embedder/Playwright/mac/BrowserWindowController.m
@@ -163,6 +163,7 @@ static void* keyValueObservingContext = &keyValueObservingContext;
 - (void)awakeFromNib
 {
     _webView = [[WKWebView alloc] initWithFrame:[containerView bounds] configuration:_configuration];
+    _webView._windowOcclusionDetectionEnabled = NO;
 
     _webView.allowsMagnification = YES;
     _webView.allowsBackForwardNavigationGestures = YES;