auto-submit · Sep 1, 2026 · Aug 3, 2026 · Aug 4, 2026 · Aug 5, 2026 · Aug 5, 2026
diff --git a/engine/src/flutter/lib/web_ui/lib/src/engine/view_embedder/style_manager.dart b/engine/src/flutter/lib/web_ui/lib/src/engine/view_embedder/style_manager.dart
@@ -52,6 +52,16 @@ class StyleManager {
     assert(semanticsHost.tagName.toLowerCase() == DomManager.semanticsHostTagName.toLowerCase());
     semanticsHost.style
       ..position = 'absolute'
+      // Anchor the host at the view origin. Without an explicit left/top, this
+      // position:absolute element falls back to its static position. On WebKit
+      // (all iOS browsers) that static position is flowed past the in-flow
+      // sibling hosts (flt-glass-pane, one viewport wide), offsetting every
+      // semantic element horizontally so taps on text fields land off the
+      // <input> and the keyboard never opens. Blink and Gecko resolve the same
+      // static position to 0, so this is a no-op there.
+      // See: https://github.com/flutter/flutter/issues/190483
+      ..left = '0'
+      ..top = '0'
       ..transformOrigin = '0 0 0';
     scaleSemanticsHost(semanticsHost, devicePixelRatio);
   }

diff --git a/engine/src/flutter/lib/web_ui/test/engine/view_embedder/style_manager_test.dart b/engine/src/flutter/lib/web_ui/test/engine/view_embedder/style_manager_test.dart
@@ -61,6 +61,12 @@ void doTests() {
       StyleManager.styleSemanticsHost(semanticsHost, 4.0);
       expect(semanticsHost.style.transform, 'scale(0.25)');
       expect(semanticsHost.style.position, 'absolute');
+      // The host must be anchored at the view origin. Without an explicit
+      // left/top it falls back to a static position flowed after its sibling
+      // hosts, offsetting the whole semantics tree. See:
+      // https://github.com/flutter/flutter/issues/190483
+      expect(semanticsHost.style.left, '0px');
+      expect(semanticsHost.style.top, '0px');
       expect(semanticsHost.style.transformOrigin, anyOf('0px 0px 0px', '0px 0px'));
     });