diff --git a/frontend/src/features/agents/CustomAgentChatView.test.tsx b/frontend/src/features/agents/CustomAgentChatView.test.tsx
index 4e7357e9..f9d45687 100644
--- a/frontend/src/features/agents/CustomAgentChatView.test.tsx
+++ b/frontend/src/features/agents/CustomAgentChatView.test.tsx
@@ -1598,7 +1598,7 @@ describe("CustomAgentChatView", () => {
     expect(screen.getByText("Progress").parentElement?.textContent).toContain("Terminé");
   });
 
-  it("does not append late progress chunks after the final answer", async () => {
+  it("renders late progress chunks after the final answer without reopening the turn", async () => {
     let emitChunk: ((chunk: unknown) => void) | null = null;
     const agent = {
       launchAgentChat: vi.fn(),
@@ -1672,7 +1672,10 @@ describe("CustomAgentChatView", () => {
       });
     });
 
-    expect(screen.queryByText("idea_ticket_read")).toBeNull();
+    expect(screen.getByText("done")).toBeTruthy();
+    expect(screen.getByText("idea_ticket_read")).toBeTruthy();
+    expect(screen.getByRole("button", { name: "Envoyer" })).toBeTruthy();
+    expect(screen.queryByRole("button", { name: "Stop" })).toBeNull();
   });
 
   it("shows slash-command suggestions from the gateway, filters by prefix, and inserts the selected command", async () => {
diff --git a/frontend/src/features/agents/CustomAgentChatView.tsx b/frontend/src/features/agents/CustomAgentChatView.tsx
index 126f5c33..113f9ada 100644
--- a/frontend/src/features/agents/CustomAgentChatView.tsx
+++ b/frontend/src/features/agents/CustomAgentChatView.tsx
@@ -425,19 +425,21 @@ function isRecoverableNoResponseTurn(turn: ChatTurn | undefined): boolean {
 }
 
 function turnsIndicateBusy(state: ChatViewState): boolean {
+  let sawOpenActivity = false;
   for (let index = state.turns.length - 1; index >= 0; index -= 1) {
     const turn = state.turns[index];
     if (turn.role === "final" || turn.role === "error") return false;
-    if (turn.role === "agent" && turn.pending) return true;
+    if (turn.role === "user") return sawOpenActivity;
+    if (turn.role === "agent" && turn.pending) sawOpenActivity = true;
     if (
       turn.role === "progress" &&
       !turn.settled &&
       progressStageBucket(turn.progress) !== "completed"
     ) {
-      return true;
+      sawOpenActivity = true;
     }
   }
-  return false;
+  return sawOpenActivity;
 }
 
 function insertTextAtSelection(
@@ -610,6 +612,14 @@ function foldChunk(
     if (isRecoverableNoResponseTurn(last) && raw.kind !== "error") {
       return foldChunk({ ...state, turns: turns.slice(0, -1) }, raw, receivedAtMs);
     }
+    if (raw.kind === "progress") {
+      return appendProgress(state, normalizeProgress(raw.progress) ?? {
+        source: "ideaLocal",
+        kind: "other",
+        stage: "info",
+        label: unknownChunkLabel(raw),
+      });
+    }
     return state;
   }
   switch (raw.kind) {