diff --git a/apps/readest-app/src/__tests__/document/fixed-layout-paginated-scroll.test.ts b/apps/readest-app/src/__tests__/document/fixed-layout-paginated-scroll.test.ts
new file mode 100644
index 00000000..ea9f2b77
--- /dev/null
+++ b/apps/readest-app/src/__tests__/document/fixed-layout-paginated-scroll.test.ts
@@ -0,0 +1,40 @@
+import { describe, expect, it } from 'vitest';
+
+import { computePaginatedScroll } from 'foliate-js/fixed-layout.js';
+
+describe('fixed-layout paginated page-turn scroll reset', () => {
+  it('resets the vertical scroll to the top of the page on a page turn (#4683)', () => {
+    // A tall fit-width page leaves the host scrolled to the bottom; turning to
+    // the next page must start at the top, not inherit the previous offset.
+    expect(
+      computePaginatedScroll({
+        elementWidth: 800,
+        containerWidth: 800,
+        scrollTop: 1200,
+        pageTurn: true,
+      }),
+    ).toEqual({ scrollLeft: 0, scrollTop: 0 });
+  });
+
+  it('preserves the vertical scroll on a non-navigation re-render (resize/zoom/theme)', () => {
+    expect(
+      computePaginatedScroll({
+        elementWidth: 800,
+        containerWidth: 800,
+        scrollTop: 1200,
+        pageTurn: false,
+      }),
+    ).toEqual({ scrollLeft: 0, scrollTop: 1200 });
+  });
+
+  it('re-centers horizontally when the page is wider than the viewport', () => {
+    expect(
+      computePaginatedScroll({
+        elementWidth: 1200,
+        containerWidth: 800,
+        scrollTop: 0,
+        pageTurn: true,
+      }),
+    ).toEqual({ scrollLeft: 200, scrollTop: 0 });
+  });
+});
diff --git a/packages/foliate-js b/packages/foliate-js
index 828d6132..981298cf 160000
--- a/packages/foliate-js
+++ b/packages/foliate-js
@@ -1 +1 @@
-Subproject commit 828d6132ea4ad973657b68832f18757dbb289f85
+Subproject commit 981298cf4074e4ed61b452de34926deab1b53126