diff --git a/CHANGELOG.md b/CHANGELOG.md
index 08148e3394c..71aebca5a3f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -61,6 +61,7 @@ Docs: https://docs.openclaw.ai
 ### Fixes
 
 - Control UI/Talk: make failed Talk startup errors dismissable and clear the stale Talk error state when dismissed, so missing realtime voice provider configuration does not leave a permanent chat banner. Fixes #77071. Thanks @ijoshdavis.
+- Control UI/Talk: stop and clear failed realtime Talk sessions when dismissing runtime error banners, so the next Talk click starts a fresh session instead of only stopping the stale one. Thanks @vincentkoc.
 - Google Chat: create an isolated Google auth transport per auth client, so google-auth-library interceptor mutations do not accumulate across webhook verification and access-token clients. Thanks @vincentkoc.
 - Control UI/performance: cap long-task and long-animation-frame diagnostics in the shared event log, so slow-render telemetry does not evict gateway/plugin events from the Debug and Overview views. Thanks @vincentkoc.
 - Web fetch: late-bind `web_fetch` config and provider fallback metadata from the active runtime snapshot, matching `web_search` so long-lived tools do not use stale fetch provider settings. Thanks @vincentkoc.
diff --git a/ui/src/ui/app-render.helpers.node.test.ts b/ui/src/ui/app-render.helpers.node.test.ts
index 8b531f6fafd..c85408fe60f 100644
--- a/ui/src/ui/app-render.helpers.node.test.ts
+++ b/ui/src/ui/app-render.helpers.node.test.ts
@@ -911,19 +911,23 @@ describe("switchChatSession", () => {
 
 describe("dismissChatError", () => {
   it("clears persistent Talk error state", () => {
+    const stop = vi.fn();
     const state = {
       lastError: 'Realtime voice provider "openai" is not configured',
       lastErrorCode: "UNAVAILABLE",
-      realtimeTalkActive: false,
+      realtimeTalkActive: true,
+      realtimeTalkSession: { stop },
       realtimeTalkStatus: "error",
       realtimeTalkDetail: 'Realtime voice provider "openai" is not configured',
       realtimeTalkTranscript: "partial transcript",
-    } as AppViewState;
+    } as unknown as AppViewState & { realtimeTalkSession: { stop(): void } | null };
 
     dismissChatError(state);
 
     expect(state.lastError).toBeNull();
     expect(state.lastErrorCode).toBeNull();
+    expect(stop).toHaveBeenCalledOnce();
+    expect(state.realtimeTalkSession).toBeNull();
     expect(state.realtimeTalkActive).toBe(false);
     expect(state.realtimeTalkStatus).toBe("idle");
     expect(state.realtimeTalkDetail).toBeNull();
diff --git a/ui/src/ui/app-render.helpers.ts b/ui/src/ui/app-render.helpers.ts
index 28efcccce82..0277a5cc653 100644
--- a/ui/src/ui/app-render.helpers.ts
+++ b/ui/src/ui/app-render.helpers.ts
@@ -623,6 +623,11 @@ export function dismissChatError(state: AppViewState) {
   state.lastError = null;
   state.lastErrorCode = null;
   if (state.realtimeTalkStatus === "error") {
+    const talkHost = state as unknown as {
+      realtimeTalkSession?: { stop(): void } | null;
+    };
+    talkHost.realtimeTalkSession?.stop();
+    talkHost.realtimeTalkSession = null;
     state.realtimeTalkActive = false;
     state.realtimeTalkStatus = "idle";
     state.realtimeTalkDetail = null;