diff --git a/packages/flutter/lib/src/widgets/scroll_position.dart b/packages/flutter/lib/src/widgets/scroll_position.dart
index 3712b9b976..e9154a1218 100644
--- a/packages/flutter/lib/src/widgets/scroll_position.dart
+++ b/packages/flutter/lib/src/widgets/scroll_position.dart
@@ -757,6 +757,26 @@ abstract class ScrollPosition extends ViewportOffset with ScrollMetrics {
     context.setSemanticsActions(_semanticActions!);
   }
 
+  ScrollPositionAlignmentPolicy _maybeFlipAlignment(ScrollPositionAlignmentPolicy alignmentPolicy) {
+    return switch (alignmentPolicy) {
+      // Don't flip when explicit.
+      ScrollPositionAlignmentPolicy.explicit => alignmentPolicy,
+      ScrollPositionAlignmentPolicy.keepVisibleAtEnd => ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      ScrollPositionAlignmentPolicy.keepVisibleAtStart => ScrollPositionAlignmentPolicy.keepVisibleAtEnd,
+    };
+  }
+
+  ScrollPositionAlignmentPolicy _applyAxisDirectionToAlignmentPolicy(ScrollPositionAlignmentPolicy alignmentPolicy) {
+    return switch (axisDirection) {
+      // Start and end alignments must account for axis direction.
+      // When focus is requested for example, it knows the directionality of the
+      // keyboard keys initiating traversal, but not the direction of the
+      // Scrollable.
+      AxisDirection.up || AxisDirection.left => _maybeFlipAlignment(alignmentPolicy),
+      AxisDirection.down || AxisDirection.right => alignmentPolicy,
+    };
+  }
+
   /// Animates the position such that the given object is as visible as possible
   /// by just scrolling this position.
   ///
@@ -790,7 +810,7 @@ abstract class ScrollPosition extends ViewportOffset with ScrollMetrics {
     }
 
     double target;
-    switch (alignmentPolicy) {
+    switch (_applyAxisDirectionToAlignmentPolicy(alignmentPolicy)) {
       case ScrollPositionAlignmentPolicy.explicit:
         target = clampDouble(viewport.getOffsetToReveal(object, alignment, rect: targetRect).offset, minScrollExtent, maxScrollExtent);
       case ScrollPositionAlignmentPolicy.keepVisibleAtEnd:
diff --git a/packages/flutter/test/widgets/ensure_visible_test.dart b/packages/flutter/test/widgets/ensure_visible_test.dart
index e4155acc54..16f493804c 100644
--- a/packages/flutter/test/widgets/ensure_visible_test.dart
+++ b/packages/flutter/test/widgets/ensure_visible_test.dart
@@ -8,7 +8,7 @@ import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
 
-Finder findKey(int i) => find.byKey(ValueKey<int>(i));
+Finder findKey(int i) => find.byKey(ValueKey<int>(i), skipOffstage: false);
 
 Widget buildSingleChildScrollView(Axis scrollDirection, { bool reverse = false }) {
   return Directionality(
@@ -147,6 +147,47 @@ void main() {
       await tester.pump();
       await tester.pump(const Duration(milliseconds: 1020));
       expect(tester.getBottomRight(findKey(3)).dy, equals(500.0));
+
+      // Regression test for https://github.com/flutter/flutter/issues/128749
+      // Reset to zero position.
+      tester.state<ScrollableState>(find.byType(Scrollable)).position.jumpTo(0.0);
+      await tester.pump();
+      // 4 is not currently visible as the SingleChildScrollView is contained
+      // within a centered SizedBox.
+      expect(tester.getBottomLeft(findKey(4)).dy, equals(100.0));
+      expect(tester.getBottomLeft(findKey(6)).dy, equals(500.0));
+      Scrollable.ensureVisible(
+        findContext(6),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      Scrollable.ensureVisible(
+        findContext(5),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      // 5 and 6 are already visible beyond the top edge, so no change.
+      expect(tester.getBottomLeft(findKey(4)).dy, equals(100.0));
+      expect(tester.getBottomLeft(findKey(6)).dy, equals(500.0));
+      Scrollable.ensureVisible(
+        findContext(4),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      // Since it is reversed, 4 should have come into view at the top
+      // edge of the scrollable, matching the alignment expectation.
+      expect(tester.getBottomLeft(findKey(4)).dy, equals(300.0));
+      expect(tester.getBottomLeft(findKey(6)).dy, equals(700.0));
+
+      // Bring 6 back into view at the trailing edge, checking the other
+      // alignment.
+      Scrollable.ensureVisible(
+        findContext(6),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtEnd,
+      );
+      await tester.pump();
+      expect(tester.getBottomLeft(findKey(4)).dy, equals(100.0));
+      expect(tester.getBottomLeft(findKey(6)).dy, equals(500.0));
     });
 
     testWidgets('SingleChildScrollView ensureVisible Axis.horizontal reverse', (WidgetTester tester) async {
@@ -174,6 +215,52 @@ void main() {
       await tester.pump();
       await tester.pump(const Duration(milliseconds: 1020));
       expect(tester.getBottomRight(findKey(3)).dx, equals(700.0));
+
+      // Regression test for https://github.com/flutter/flutter/issues/128749
+      // Reset to zero position.
+      tester.state<ScrollableState>(find.byType(Scrollable)).position.jumpTo(0.0);
+      await tester.pump();
+      // 4 is not currently visible as the SingleChildScrollView is contained
+      // within a centered SizedBox.
+      expect(tester.getBottomLeft(findKey(3)).dx, equals(-100.0));
+      expect(tester.getBottomLeft(findKey(6)).dx, equals(500.0));
+      Scrollable.ensureVisible(
+        findContext(6),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      Scrollable.ensureVisible(
+        findContext(5),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      Scrollable.ensureVisible(
+        findContext(4),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      // 4, 5 and 6 are already visible beyond the left edge, so no change.
+      expect(tester.getBottomLeft(findKey(3)).dx, equals(-100.0));
+      expect(tester.getBottomLeft(findKey(6)).dx, equals(500.0));
+      Scrollable.ensureVisible(
+        findContext(3),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      // Since it is reversed, 3 should have come into view at the leading
+      // edge of the scrollable, matching the alignment expectation.
+      expect(tester.getBottomLeft(findKey(3)).dx, equals(100.0));
+      expect(tester.getBottomLeft(findKey(6)).dx, equals(700.0));
+
+      // Bring 6 back into view at the trailing edge, checking the other
+      // alignment.
+      Scrollable.ensureVisible(
+        findContext(6),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtEnd,
+      );
+      await tester.pump();
+      expect(tester.getBottomLeft(findKey(3)).dx, equals(-100.0));
+      expect(tester.getBottomLeft(findKey(6)).dx, equals(500.0));
     });
 
     testWidgets('SingleChildScrollView ensureVisible rotated child', (WidgetTester tester) async {
@@ -407,6 +494,46 @@ void main() {
       await tester.pump();
       await tester.pump(const Duration(milliseconds: 1020));
       expect(tester.getBottomRight(findKey(3)).dy, equals(500.0));
+
+      // Regression test for https://github.com/flutter/flutter/issues/128749
+      // Reset to zero position.
+      await prepare(0.0);
+      // 2 is not currently visible as the ListView is contained
+      // within a centered SizedBox.
+      expect(tester.getBottomLeft(findKey(2)).dy, equals(100.0));
+      expect(tester.getBottomLeft(findKey(0)).dy, equals(500.0));
+      Scrollable.ensureVisible(
+        findContext(0),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      Scrollable.ensureVisible(
+        findContext(1),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      // 0 and 1 are already visible beyond the top edge, so no change.
+      expect(tester.getBottomLeft(findKey(2)).dy, equals(100.0));
+      expect(tester.getBottomLeft(findKey(0)).dy, equals(500.0));
+      Scrollable.ensureVisible(
+        findContext(2),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      // Since it is reversed, 2 should have come into view at the top
+      // edge of the scrollable, matching the alignment expectation.
+      expect(tester.getBottomLeft(findKey(2)).dy, equals(300.0));
+      expect(tester.getBottomLeft(findKey(0)).dy, equals(700.0));
+
+      // Bring 0 back into view at the trailing edge, checking the other
+      // alignment.
+      Scrollable.ensureVisible(
+        findContext(0),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtEnd,
+      );
+      await tester.pump();
+      expect(tester.getBottomLeft(findKey(2)).dy, equals(100.0));
+      expect(tester.getBottomLeft(findKey(0)).dy, equals(500.0));
     });
 
     testWidgets('ListView ensureVisible Axis.horizontal reverse', (WidgetTester tester) async {
@@ -443,6 +570,51 @@ void main() {
       await tester.pump();
       await tester.pump(const Duration(milliseconds: 1020));
       expect(tester.getBottomRight(findKey(3)).dx, equals(700.0));
+
+      // Regression test for https://github.com/flutter/flutter/issues/128749
+      // Reset to zero position.
+      await prepare(0.0);
+      // 3 is not currently visible as the ListView is contained
+      // within a centered SizedBox.
+      expect(tester.getBottomLeft(findKey(3)).dx, equals(-100.0));
+      expect(tester.getBottomLeft(findKey(0)).dx, equals(500.0));
+      Scrollable.ensureVisible(
+        findContext(0),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      Scrollable.ensureVisible(
+        findContext(1),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      Scrollable.ensureVisible(
+        findContext(2),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      // 0, 1 and 2 are already visible beyond the left edge, so no change.
+      expect(tester.getBottomLeft(findKey(3)).dx, equals(-100.0));
+      expect(tester.getBottomLeft(findKey(0)).dx, equals(500.0));
+      Scrollable.ensureVisible(
+        findContext(3),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      // Since it is reversed, 3 should have come into view at the leading
+      // edge of the scrollable, matching the alignment expectation.
+      expect(tester.getBottomLeft(findKey(3)).dx, equals(100.0));
+      expect(tester.getBottomLeft(findKey(0)).dx, equals(700.0));
+
+      // Bring 0 back into view at the trailing edge, checking the other
+      // alignment.
+      Scrollable.ensureVisible(
+        findContext(0),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtEnd,
+      );
+      await tester.pump();
+      expect(tester.getBottomLeft(findKey(3)).dx, equals(-100.0));
+      expect(tester.getBottomLeft(findKey(0)).dx, equals(500.0));
     });
 
     testWidgets('ListView ensureVisible negative child', (WidgetTester tester) async {
@@ -662,6 +834,46 @@ void main() {
       await tester.pump();
       await tester.pump(const Duration(milliseconds: 1020));
       expect(tester.getBottomRight(findKey(3)).dy, equals(500.0));
+
+      // Regression test for https://github.com/flutter/flutter/issues/128749
+      // Reset to zero position.
+      await prepare(0.0);
+      // 2 is not currently visible as the ListView is contained
+      // within a centered SizedBox.
+      expect(tester.getBottomLeft(findKey(2)).dy, equals(100.0));
+      expect(tester.getBottomLeft(findKey(0)).dy, equals(500.0));
+      Scrollable.ensureVisible(
+        findContext(0),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      Scrollable.ensureVisible(
+        findContext(1),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      // 0 and 1 are already visible beyond the top edge, so no change.
+      expect(tester.getBottomLeft(findKey(2)).dy, equals(100.0));
+      expect(tester.getBottomLeft(findKey(0)).dy, equals(500.0));
+      Scrollable.ensureVisible(
+        findContext(2),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      // Since it is reversed, 2 should have come into view at the top
+      // edge of the scrollable, matching the alignment expectation.
+      expect(tester.getBottomLeft(findKey(2)).dy, equals(300.0));
+      expect(tester.getBottomLeft(findKey(0)).dy, equals(700.0));
+
+      // Bring 0 back into view at the trailing edge, checking the other
+      // alignment.
+      Scrollable.ensureVisible(
+        findContext(0),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtEnd,
+      );
+      await tester.pump();
+      expect(tester.getBottomLeft(findKey(2)).dy, equals(100.0));
+      expect(tester.getBottomLeft(findKey(0)).dy, equals(500.0));
     });
 
     testWidgets('ListView ensureVisible Axis.horizontal reverse', (WidgetTester tester) async {
@@ -698,6 +910,51 @@ void main() {
       await tester.pump();
       await tester.pump(const Duration(milliseconds: 1020));
       expect(tester.getBottomRight(findKey(3)).dx, equals(700.0));
+
+      // Regression test for https://github.com/flutter/flutter/issues/128749
+      // Reset to zero position.
+      await prepare(0.0);
+      // 3 is not currently visible as the ListView is contained
+      // within a centered SizedBox.
+      expect(tester.getBottomLeft(findKey(3)).dx, equals(-100.0));
+      expect(tester.getBottomLeft(findKey(0)).dx, equals(500.0));
+      Scrollable.ensureVisible(
+        findContext(0),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      Scrollable.ensureVisible(
+        findContext(1),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      Scrollable.ensureVisible(
+        findContext(2),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      // 0, 1 and 2 are already visible beyond the left edge, so no change.
+      expect(tester.getBottomLeft(findKey(3)).dx, equals(-100.0));
+      expect(tester.getBottomLeft(findKey(0)).dx, equals(500.0));
+      Scrollable.ensureVisible(
+        findContext(3),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtStart,
+      );
+      await tester.pump();
+      // Since it is reversed, 3 should have come into view at the leading
+      // edge of the scrollable, matching the alignment expectation.
+      expect(tester.getBottomLeft(findKey(3)).dx, equals(100.0));
+      expect(tester.getBottomLeft(findKey(0)).dx, equals(700.0));
+
+      // Bring 0 back into view at the trailing edge, checking the other
+      // alignment.
+      Scrollable.ensureVisible(
+        findContext(0),
+        alignmentPolicy: ScrollPositionAlignmentPolicy.keepVisibleAtEnd,
+      );
+      await tester.pump();
+      expect(tester.getBottomLeft(findKey(3)).dx, equals(-100.0));
+      expect(tester.getBottomLeft(findKey(0)).dx, equals(500.0));
     });
   });