diff --git a/apps/mobile/src/features/workspace/WorkspaceRootScreen.android.tsx b/apps/mobile/src/features/workspace/WorkspaceRootScreen.android.tsx
index ae7e6aa0842c0..1fa6a87bf596a 100644
--- a/apps/mobile/src/features/workspace/WorkspaceRootScreen.android.tsx
+++ b/apps/mobile/src/features/workspace/WorkspaceRootScreen.android.tsx
@@ -33,64 +33,45 @@ export function WorkspaceRootScreen() {
   const floating = floatingTabsMetrics(enabled.length + 1, scale, fabSize, window.width);
   const context = {
     ...workspace,
-    bottomClearance: floatingTabsEnabled
-      ? insets.bottom +
-        FLOATING_TABS.bottom +
-        FLOATING_TABS.edge +
-        Math.max(
-          floating.height,
-          workspace.state.selectedTab === "threads" ? floating.fabOffset + fabSize : 0,
-        )
-      : workspace.state.selectedTab === "threads"
-        ? fabClearance + 16
-        : 16,
+    bottomClearance: layout.usesSplitView
+      ? workspace.bottomClearance
+      : floatingTabsEnabled
+        ? insets.bottom +
+          FLOATING_TABS.bottom +
+          FLOATING_TABS.edge +
+          Math.max(
+            floating.height,
+            workspace.state.selectedTab === "threads" ? floating.fabOffset + fabSize : 0,
+          )
+        : workspace.state.selectedTab === "threads"
+          ? fabClearance + 16
+          : 16,
   };
   const tab = workspace.state.selectedTab;
 
-  if (layout.usesSplitView) {
-    if (enabled.length === 0) return <View className="flex-1 bg-screen" />;
-    return (
-      <WorkspaceTabPanes
-        tabs={TABS}
-        selected={tab}
-        renderTab={(tab) =>
-          tab === "threads" ? (
-            <HomeRouteScreen />
-          ) : tab !== "pullRequests" ? (
-            <WorkspaceExtraTab tab={tab} />
-          ) : (
-            <>
-              <NativeStackScreenOptions options={{ headerShown: false }} />
-              <AndroidScreenHeader title="Pull requests" />
-              <View className="flex-1 items-center justify-center px-10">
-                <EmptyState
-                  title="Select a pull request"
-                  detail="Choose a pull request from the sidebar to review it."
-                  variant="plain"
-                />
-              </View>
-            </>
-          )
-        }
-      />
-    );
-  }
-
   return (
     <WorkspaceTabsContext value={context}>
-      <View className="flex-1 bg-header">
-        <NativeStackScreenOptions options={{ headerShown: false }} />
+      <View className={layout.usesSplitView ? "flex-1 bg-screen" : "flex-1 bg-header"}>
+        {!layout.usesSplitView ? (
+          <NativeStackScreenOptions options={{ headerShown: false }} />
+        ) : null}
         <SafeAreaInsetsContext
           value={
-            floatingTabsEnabled
-              ? tab === "usage"
-                ? { ...insets, bottom: context.bottomClearance }
-                : insets
-              : { ...insets, bottom: 0 }
+            layout.usesSplitView
+              ? insets
+              : floatingTabsEnabled
+                ? tab === "usage"
+                  ? { ...insets, bottom: context.bottomClearance }
+                  : insets
+                : { ...insets, bottom: 0 }
           }
         >
           {enabled.length === 0 ? (
-            <WorkspaceNoTabs />
+            layout.usesSplitView ? (
+              <View className="flex-1 bg-screen" />
+            ) : (
+              <WorkspaceNoTabs />
+            )
           ) : (
             <WorkspaceTabPanes
               tabs={TABS}
@@ -100,6 +81,18 @@ export function WorkspaceRootScreen() {
                   <HomeRouteScreen />
                 ) : tab !== "pullRequests" ? (
                   <WorkspaceExtraTab tab={tab} />
+                ) : layout.usesSplitView ? (
+                  <>
+                    <NativeStackScreenOptions options={{ headerShown: false }} />
+                    <AndroidScreenHeader title="Pull requests" />
+                    <View className="flex-1 items-center justify-center px-10">
+                      <EmptyState
+                        title="Select a pull request"
+                        detail="Choose a pull request from the sidebar to review it."
+                        variant="plain"
+                      />
+                    </View>
+                  </>
                 ) : (
                   <PullRequestsScreen
                     renderFrame={(filters, list) => (
@@ -114,7 +107,7 @@ export function WorkspaceRootScreen() {
             />
           )}
         </SafeAreaInsetsContext>
-        {floatingTabsEnabled ? (
+        {layout.usesSplitView ? null : floatingTabsEnabled ? (
           <FloatingWorkspaceTabs fillWidth onNewThread={startNewTask} />
         ) : (
           <AndroidWorkspaceNavigation onNewThread={startNewTask} />
diff --git a/apps/mobile/src/features/workspace/workspace-tabs-state.test.ts b/apps/mobile/src/features/workspace/workspace-tabs-state.test.ts
index d0f72faa07727..8b1fccef6ebc1 100644
--- a/apps/mobile/src/features/workspace/workspace-tabs-state.test.ts
+++ b/apps/mobile/src/features/workspace/workspace-tabs-state.test.ts
@@ -1,4 +1,7 @@
-import { describe, expect, it } from "vite-plus/test";
+import { describe, expect, it, vi } from "vite-plus/test";
+import { act, createElement, createContext, useState, type ReactNode } from "react";
+import { createRoot } from "react-dom/client";
+import { WorkspaceRootScreen } from "./WorkspaceRootScreen.android";
 import {
   initialWorkspaceTabsState,
   workspaceTabsReducer,
@@ -161,3 +164,91 @@ describe("workspace root navigation", () => {
     expect(workspaceTabForNativeSlot(order, "removed")).toBeNull();
   });
 });
+
+const mocks = vi.hoisted(() => ({ split: false, floating: false }));
+
+vi.mock("../settings/appearance/AppearancePreferencesProvider", () => ({
+  useAndroidFloatingTabs: () => mocks.floating,
+}));
+vi.mock("react-native", () => ({
+  useWindowDimensions: () => ({ width: 400, height: 800 }),
+  View: ({ children }: { children: ReactNode }) => createElement("div", null, children),
+}));
+vi.mock("react-native-safe-area-context", () => ({
+  SafeAreaInsetsContext: createContext({ top: 0, right: 0, bottom: 24, left: 0 }),
+  useSafeAreaInsets: () => ({ top: 0, right: 0, bottom: 24, left: 0 }),
+}));
+vi.mock("../layout/AdaptiveWorkspaceLayout", () => ({
+  useAdaptiveWorkspaceLayout: () => ({
+    layout: { usesSplitView: mocks.split },
+    startNewTask: () => undefined,
+  }),
+}));
+vi.mock("./navigation-tabs", () => ({
+  useEnabledNavigationTabs: () => ["threads", "pullRequests", "usage"],
+}));
+vi.mock("./WorkspaceTabsContext", () => ({
+  WorkspaceTabsContext: createContext(null),
+  useWorkspaceTabs: () => ({ state: { selectedTab: "usage" } }),
+}));
+vi.mock("./WorkspaceExtraTab", () => ({
+  WorkspaceExtraTab: function UsageProbe() {
+    const [tab, setTab] = useState("Limits");
+    return createElement("button", { onClick: () => setTab("Usage") }, tab);
+  },
+}));
+vi.mock("../../native/StackHeader", () => ({ NativeStackScreenOptions: () => null }));
+vi.mock("../../components/ui/AndroidScreenHeader", () => ({ AndroidScreenHeader: () => null }));
+vi.mock("../../components/ui/EmptyState", () => ({ EmptyState: () => null }));
+vi.mock("../../components/ui/ScreenContent", () => ({
+  ScreenContent: ({ children }: { children: ReactNode }) => createElement("div", null, children),
+}));
+vi.mock("../../components/ui/useAndroidControlSizing", () => ({
+  useAndroidControlSizing: () => ({ fabClearance: 64, scale: 1, fabSize: 56 }),
+}));
+vi.mock("../home/HomeRouteScreen", () => ({ HomeRouteScreen: () => null }));
+vi.mock("../pull-requests/PullRequestFilterMenuContext", () => ({
+  PullRequestFilterMenuProvider: ({ children }: { children: ReactNode }) =>
+    createElement("div", null, children),
+}));
+vi.mock("../pull-requests/PullRequestsScreen", () => ({ PullRequestsScreen: () => null }));
+vi.mock("../pull-requests/PullRequestToolbar.android", () => ({ PullRequestToolbar: () => null }));
+vi.mock("./AndroidWorkspaceNavigation", () => ({
+  AndroidWorkspaceNavigation: () => null,
+  FloatingWorkspaceTabs: () => null,
+}));
+vi.mock("./WorkspaceNoTabs", () => ({ WorkspaceNoTabs: () => null }));
+
+function setup(split: boolean, floating: boolean) {
+  mocks.split = split;
+  mocks.floating = floating;
+  vi.stubGlobal("IS_REACT_ACT_ENVIRONMENT", true);
+  return { [Symbol.dispose]: () => vi.unstubAllGlobals() };
+}
+
+it.each([
+  [false, false],
+  [true, false],
+  [false, true],
+  [true, true],
+])(
+  "keeps the Usage page mounted through layout transitions (split: %s, floating: %s)",
+  async (split, floating) => {
+    using _actEnvironment = setup(split, floating);
+    const container = document.createElement("div");
+    const root = createRoot(container);
+    using _root = { [Symbol.dispose]: () => act(() => root.unmount()) };
+    await act(async () => root.render(createElement(WorkspaceRootScreen)));
+
+    const button = container.querySelector("button")!;
+    await act(async () => button.click());
+    expect(button.textContent).toBe("Usage");
+
+    for (const nextSplit of [!split, split, !split, split]) {
+      mocks.split = nextSplit;
+      await act(async () => root.render(createElement(WorkspaceRootScreen)));
+      expect(container.querySelector("button")?.textContent).toBe("Usage");
+      expect(container.querySelector("button")).toBe(button);
+    }
+  },
+);
diff --git a/apps/mobile/vite.config.ts b/apps/mobile/vite.config.ts
index 9ddb84efbc832..3b499ad7e3dc6 100644
--- a/apps/mobile/vite.config.ts
+++ b/apps/mobile/vite.config.ts
@@ -4,6 +4,7 @@ import { defineConfig, normalizePath } from "vite-plus";
 import "vite-plus/test/config";
 
 const reactTests = [
+  "src/features/workspace/workspace-tabs-state.test.ts",
   "src/features/threads/git/GitBranchesSheet.occupancy.test.tsx",
   "src/features/files/useFileTreeEntries.test.tsx",
   "src/features/projects/AddProjectScreen.test.ts",