diff --git a/apps/mobile/src/features/threads/threadListV2.test.ts b/apps/mobile/src/features/threads/threadListV2.test.ts
index c848e063e2bed..c4288b79f6b46 100644
--- a/apps/mobile/src/features/threads/threadListV2.test.ts
+++ b/apps/mobile/src/features/threads/threadListV2.test.ts
@@ -36,6 +36,7 @@ import {
   buildThreadListV2Items,
   buildThreadListV2ListItems,
   getThreadListV2OrderedSection,
+  isThreadListV2EnvironmentDisconnected,
   layoutThreadListV2RowMenuActions,
   resolveThreadListV2SnoozeMenuSelection,
   resolveThreadListV2SwipeActions,
@@ -210,6 +211,17 @@ describe("resolveThreadListV2Status", () => {
   );
 });
 
+describe("isThreadListV2EnvironmentDisconnected", () => {
+  it.each([
+    ["connected", false],
+    ["connecting", false],
+    ["reconnecting", true],
+    ["offline", true],
+  ] as const)("treats %s as disconnected: %s", (connectionState, disconnected) => {
+    expect(isThreadListV2EnvironmentDisconnected(connectionState)).toBe(disconnected);
+  });
+});
+
 describe("resolveThreadListV2SwipeActions", () => {
   it("offers snooze for a presented input request and moves it onto the snoozed shelf", () => {
     const raw = makeRawThreadShell({
@@ -1719,6 +1731,23 @@ describe("Working section beta", () => {
     }
   });
 
+  it("lists a working thread on a disconnected environment outside the shelf", () => {
+    const unreachableId = EnvironmentId.make("environment-unreachable");
+    const unreachable = makeThreadShellFixture({
+      environmentId: unreachableId,
+      id: ThreadId.make("unreachable"),
+      title: "unreachable",
+      runtime: running,
+    });
+    const layout = build({
+      threads: [...threads, unreachable],
+      disconnectedEnvironmentIds: new Set([unreachableId]),
+    });
+
+    expect(ids(layout)).toContain("unreachable");
+    expect(layout.workingCount).toBe(1);
+  });
+
   it("orders the inbox by the latest return this device observed", () => {
     const layout = build({
       inboxReturnAt: (thread) =>
diff --git a/apps/mobile/src/features/threads/threadListV2.ts b/apps/mobile/src/features/threads/threadListV2.ts
index 7854f9d7fdb85..dd590696624ed 100644
--- a/apps/mobile/src/features/threads/threadListV2.ts
+++ b/apps/mobile/src/features/threads/threadListV2.ts
@@ -29,6 +29,7 @@ import {
   sortPinnedThreadsByOrderKey,
   sortSettledThreads,
 } from "@t3tools/client-runtime/state/thread-sort";
+import type { EnvironmentConnectionPhase } from "@t3tools/client-runtime/connection";
 import { isListedThreadLineage, type EnvironmentId, type ProjectId } from "@t3tools/contracts";
 import type { SnoozePresetSetting } from "@t3tools/contracts/settings";
 import type { MenuAction } from "@react-native-menu/menu";
@@ -257,6 +258,13 @@ export function resolveThreadListV2WokeAt(
     : null;
 }
 
+// The first connection attempt keeps cached placement so threads do not jump shelves on launch.
+export function isThreadListV2EnvironmentDisconnected(
+  connectionState: EnvironmentConnectionPhase,
+): boolean {
+  return connectionState !== "connecting" && connectionState !== "connected";
+}
+
 export function resolveThreadListV2Status(
   thread: Pick<
     EnvironmentThreadShell,
@@ -661,6 +669,7 @@ export function buildThreadListV2Items(input: {
   readonly matchedThreadKeys?: ReadonlySet<string>;
   readonly settlementEnvironmentIds?: ReadonlySet<EnvironmentId>;
   readonly snoozeEnvironmentIds?: ReadonlySet<EnvironmentId>;
+  readonly disconnectedEnvironmentIds?: ReadonlySet<string>;
   readonly settledLimit?: number;
   readonly now: string;
   readonly workingShelfEnabled?: boolean;
@@ -702,6 +711,8 @@ export function buildThreadListV2Items(input: {
   const snoozed: EnvironmentThreadShell[] = [];
   let nextSnoozeWakeAt: string | null = null;
   const queuedThreadKeys = input.queuedThreadKeys?.size ? input.queuedThreadKeys : undefined;
+  const isDisconnected = (thread: EnvironmentThreadShell) =>
+    input.disconnectedEnvironmentIds?.has(thread.environmentId) === true;
   const listedThreads = input.threads.filter(
     (thread) =>
       thread.archivedAt === null &&
@@ -752,7 +763,12 @@ export function buildThreadListV2Items(input: {
       settled.push(thread);
     } else if (thread.pinnedAt != null) {
       pinned.push(thread);
-    } else if (workingShelfEnabled && (input.isWorking ?? isThreadWorking)(thread)) {
+    } else if (
+      workingShelfEnabled &&
+      // A shelf the user collapsed must not hide a thread whose progress is unknown.
+      !isDisconnected(thread) &&
+      (input.isWorking ?? isThreadWorking)(thread)
+    ) {
       working.push(thread);
     } else {
       active.push(thread);
diff --git a/apps/mobile/src/features/threads/useThreadListV2.test.tsx b/apps/mobile/src/features/threads/useThreadListV2.test.tsx
index 7eac8955efa14..8ff39e7e4a0e4 100644
--- a/apps/mobile/src/features/threads/useThreadListV2.test.tsx
+++ b/apps/mobile/src/features/threads/useThreadListV2.test.tsx
@@ -9,6 +9,7 @@ import { Atom, AtomRegistry } from "effect/reactivity";
 import { expect, it, vi } from "vite-plus/test";
 
 import { olderSettledThreads } from "../../state/threads";
+import { workspaceConnections } from "../../state/workspace";
 import { makeRawThreadShell } from "../../test-fixtures";
 import { useThreadListV2 } from "./useThreadListV2";
 
@@ -17,9 +18,13 @@ vi.mock("../../state/threads", () => ({
   threadFamilies: { mountRows: () => () => {} },
 }));
 vi.mock("../../state/atom-registry", () => ({ appAtomRegistry: undefined }));
+vi.mock("../../state/workspace", () => ({
+  workspaceConnections: { environmentsAtom: vi.fn() },
+}));
 
 it("reuses a large thread list across tab renders and updates when its inputs change", async () => {
   vi.stubGlobal("IS_REACT_ACT_ENVIRONMENT", true);
+  vi.mocked(workspaceConnections).environmentsAtom = Atom.make([]);
   using _globals = { [Symbol.dispose]: () => vi.unstubAllGlobals() };
   const shelfAtom = Atom.make<ReadonlyMap<EnvironmentId, OlderSettledShelfEnvironment>>(new Map());
   vi.mocked(olderSettledThreads.shelfAtom).mockReturnValue(shelfAtom);
diff --git a/apps/mobile/src/features/threads/useThreadListV2.ts b/apps/mobile/src/features/threads/useThreadListV2.ts
index fcf1048d2b6af..99a75028d2ad9 100644
--- a/apps/mobile/src/features/threads/useThreadListV2.ts
+++ b/apps/mobile/src/features/threads/useThreadListV2.ts
@@ -1,14 +1,18 @@
+import { useAtomValue } from "@effect/atom-react";
 import type { OlderSettledScope } from "@t3tools/client-runtime/state/threads";
 import type { EnvironmentId } from "@t3tools/contracts";
+import { Atom } from "effect/reactivity";
 import { useMemo, useSyncExternalStore } from "react";
 
 import { scopedProjectKey } from "../../lib/scopedEntities";
 import { useOlderSettledShelf, useOlderSettledShelfGrowth } from "../../state/olderSettledShelf";
 import type { PendingNewTask } from "../../state/use-pending-new-tasks";
+import { workspaceConnections } from "../../state/workspace";
 import {
   buildThreadListV2Items,
   buildThreadListV2ListItems,
   getThreadListV2OrderedSection,
+  isThreadListV2EnvironmentDisconnected,
   threadListInboxReturns,
   threadListV2LayoutTime,
 } from "./threadListV2";
@@ -26,6 +30,14 @@ function useKeySet(newlineSeparatedKeys: string): ReadonlySet<string> {
   );
 }
 
+const disconnectedEnvironmentIdsAtom = Atom.make((get) =>
+  get(workspaceConnections.environmentsAtom)
+    .filter((environment) => isThreadListV2EnvironmentDisconnected(environment.connectionState))
+    .map((environment) => environment.environmentId)
+    .sort()
+    .join("\n"),
+);
+
 type LayoutInput = Parameters<typeof buildThreadListV2Items>[0];
 
 /**
@@ -80,6 +92,7 @@ export function useThreadListV2(input: {
     () => observeInbox(workingShelfEnabled ? threads : null, inboxVersion),
     [threads, workingShelfEnabled, inboxVersion],
   );
+  const disconnectedEnvironmentIds = useKeySet(useAtomValue(disconnectedEnvironmentIdsAtom));
   // Compute move availability per section; per-row planning is quadratic.
   const moveAvailability = useMemo(() => {
     const sectionAvailability = (section: "pinned" | "active") =>
@@ -142,6 +155,7 @@ export function useThreadListV2(input: {
         matchedThreadKeys: new Set(input.searchMatches.keys()),
         settlementEnvironmentIds: input.settlementEnvironmentIds,
         snoozeEnvironmentIds: input.snoozeEnvironmentIds,
+        disconnectedEnvironmentIds,
         queuedThreadKeys: input.queuedThreadKeys,
         settledLimit: input.settledLimit,
         now: layoutTime,
@@ -175,6 +189,7 @@ export function useThreadListV2(input: {
       input.settlementEnvironmentIds,
       input.snoozeEnvironmentIds,
       input.queuedThreadKeys,
+      disconnectedEnvironmentIds,
       input.settledLimit,
       layoutTime,
       workingShelfEnabled,