diff --git a/packages/app/e2e/regression/settings-scroll.spec.ts b/packages/app/e2e/regression/settings-scroll.spec.ts
new file mode 100644
index 00000000000..0d414fa73f2
--- /dev/null
+++ b/packages/app/e2e/regression/settings-scroll.spec.ts
@@ -0,0 +1,69 @@
+import { expect, test } from "@playwright/test"
+import { mockOpenCodeServer } from "../utils/mock-server"
+
+test.use({ contextOptions: { reducedMotion: "reduce" }, colorScheme: "dark" })
+
+for (const viewport of [
+  { width: 1280, height: 720 },
+  { width: 900, height: 600 },
+  { width: 780, height: 600 },
+  { width: 390, height: 844 },
+]) {
+  test(`preferences scroll only inside the panel at ${viewport.width}x${viewport.height}`, async ({ page }) => {
+    const directory = "/tmp/settings-scroll"
+    await mockOpenCodeServer(page, {
+      directory,
+      project: {
+        id: "proj_settings_scroll",
+        canonical: directory,
+        name: "Settings scroll",
+        vcs: "git",
+        time: { created: 1700000000000, updated: 1700000000000 },
+      },
+      provider: { all: [], connected: [], default: {} },
+      sessions: [],
+      pageMessages: () => ({ items: [] }),
+    })
+    await page.goto("/")
+    await page.getByRole("button", { name: "Settings", exact: true }).click()
+
+    const settings = page.getByTestId("settings-screen")
+    const panel = settings.getByRole("tabpanel")
+    const main = page.getByRole("main")
+    const slider = settings.getByRole("slider", { name: "Timeline detail", exact: true })
+    await expect(settings).toBeFocused()
+    await page.setViewportSize(viewport)
+    await expect(slider).toHaveAccessibleDescription(/Choose how much activity appears in the timeline/)
+    await expect.poll(() => main.evaluate((el) => el.scrollHeight - el.clientHeight)).toBeLessThanOrEqual(1)
+
+    // Wheel over the outer gutter must not move the entire settings screen.
+    await main.hover({ position: { x: 1, y: 200 } })
+    await page.mouse.wheel(0, 10000)
+    await panel.hover()
+    await page.mouse.wheel(0, 10000)
+    await expect.poll(() => panel.evaluate((el) => el.scrollTop)).toBeGreaterThan(0)
+    await expect(main).toHaveJSProperty("scrollTop", 0)
+    await expect(settings.getByRole("heading", { name: "Preferences", exact: true })).toBeInViewport()
+
+    await slider.scrollIntoViewIfNeeded()
+    await slider.click()
+    await page.keyboard.press("Home")
+    await expect(slider).toHaveValue("0")
+    await page.keyboard.press("ArrowRight")
+    await expect(slider).toHaveValue("1")
+    await expect(slider).toBeFocused()
+
+    await settings.getByRole("button", { name: "Advanced", exact: true }).click()
+    await expect(
+      settings.getByRole("group", { name: "Set placement and details for each activity category.", exact: true }),
+    ).toBeVisible()
+    await panel.hover()
+    await page.mouse.wheel(0, 10000)
+    await expect
+      .poll(() => panel.evaluate((el) => el.scrollHeight - el.clientHeight - el.scrollTop))
+      .toBeLessThanOrEqual(1)
+    await expect(main).toHaveJSProperty("scrollTop", 0)
+    await expect.poll(() => main.evaluate((el) => el.scrollHeight - el.clientHeight)).toBeLessThanOrEqual(1)
+    await expect(settings.getByRole("heading", { name: "Preferences", exact: true })).toBeInViewport()
+  })
+}
diff --git a/packages/app/src/settings/timeline-detail.css b/packages/app/src/settings/timeline-detail.css
index 61273ac5efa..1f136de33dd 100644
--- a/packages/app/src/settings/timeline-detail.css
+++ b/packages/app/src/settings/timeline-detail.css
@@ -1,4 +1,5 @@
 [data-component="timeline-detail-control"] {
+  position: relative;
   display: flex;
   min-width: 0;
   flex-direction: column;