diff --git a/addons/im_livechat/static/src/embed/common/livechat_service.js b/addons/im_livechat/static/src/embed/common/livechat_service.js
index 6488a3bb355..e86be32b4ea 100644
--- a/addons/im_livechat/static/src/embed/common/livechat_service.js
+++ b/addons/im_livechat/static/src/embed/common/livechat_service.js
@@ -35,7 +35,7 @@ export const ODOO_VERSION_KEY = `${location.origin.replace(
 )}_im_livechat.odoo_version`;
 
 export class LivechatService {
-    TEMPORARY_ID = "livechat_temporary_thread";
+    static TEMPORARY_ID = "livechat_temporary_thread";
     SESSION_COOKIE = "im_livechat_session";
     OPERATOR_COOKIE = "im_livechat_previous_operator_pid";
     GUEST_TOKEN_STORAGE_KEY = "im_livechat_guest_token";
@@ -160,7 +160,7 @@ export class LivechatService {
             this.persistThreadPromise = null;
         }
         const chatWindow = this.store.discuss.chatWindows.find(
-            (c) => c.thread.id === this.TEMPORARY_ID
+            (c) => c.thread.id === LivechatService.TEMPORARY_ID
         );
         if (chatWindow) {
             chatWindow.thread?.delete();
@@ -213,7 +213,7 @@ export class LivechatService {
         this.updateSession(threadData);
         const thread = this.store.Thread.insert({
             ...threadData,
-            id: threadData.id ?? this.TEMPORARY_ID,
+            id: threadData.id ?? LivechatService.TEMPORARY_ID,
             isLoaded: !threadData.id || isNewlyCreated,
             model: "discuss.channel",
             type: "livechat",
@@ -264,7 +264,8 @@ export class LivechatService {
     get thread() {
         return Object.values(this.store.Thread.records).find(
             ({ id, type }) =>
-                type === "livechat" && id === (this.sessionCookie?.id ?? this.TEMPORARY_ID)
+                type === "livechat" &&
+                id === (this.sessionCookie?.id ?? LivechatService.TEMPORARY_ID)
         );
     }
 
diff --git a/addons/im_livechat/static/src/embed/common/thread_model_patch.js b/addons/im_livechat/static/src/embed/common/thread_model_patch.js
index aaf9a0771d7..f858d68d57e 100644
--- a/addons/im_livechat/static/src/embed/common/thread_model_patch.js
+++ b/addons/im_livechat/static/src/embed/common/thread_model_patch.js
@@ -1,6 +1,6 @@
 /* @odoo-module */
 
-import { SESSION_STATE } from "@im_livechat/embed/common/livechat_service";
+import { LivechatService, SESSION_STATE } from "@im_livechat/embed/common/livechat_service";
 
 import { Record } from "@mail/core/common/record";
 import { Thread } from "@mail/core/common/thread_model";
@@ -78,4 +78,8 @@ patch(Thread.prototype, {
         }
         return url(`/im_livechat/operator/${this.operator.id}/avatar`);
     },
+
+    get isTransient() {
+        return super.isTransient || this.id === LivechatService.TEMPORARY_ID;
+    },
 });
diff --git a/addons/mail/static/src/core/common/store_service.js b/addons/mail/static/src/core/common/store_service.js
index c2b7bfd8f18..bc311f2550e 100644
--- a/addons/mail/static/src/core/common/store_service.js
+++ b/addons/mail/static/src/core/common/store_service.js
@@ -207,7 +207,7 @@ export class Store extends BaseStore {
         const ids = Object.keys(this.Thread.records).sort(); // Ensure channels processed in same order.
         for (const id of ids) {
             const thread = this.Thread.records[id];
-            if (thread.model === "discuss.channel") {
+            if (thread.model === "discuss.channel" && !thread.isTransient) {
                 channelIds.push(id);
                 if (!thread.hasSelfAsMember) {
                     this.env.services["bus_service"].addChannel(`discuss.channel_${thread.id}`);
diff --git a/addons/website_livechat/static/tests/tours/lazy_frontend_bus_tour.js b/addons/website_livechat/static/tests/tours/lazy_frontend_bus_tour.js
index 7fe78bd4f82..15b448fed32 100644
--- a/addons/website_livechat/static/tests/tours/lazy_frontend_bus_tour.js
+++ b/addons/website_livechat/static/tests/tours/lazy_frontend_bus_tour.js
@@ -5,13 +5,40 @@ import { registry } from "@web/core/registry";
 registry.category("web_tour.tours").add("website_livechat.lazy_frontend_bus", {
     test: true,
     url: "/",
+    shadow_dom: ".o-livechat-root",
     steps: () => [
         {
-            trigger: "body",
+            trigger: ".o-livechat-LivechatButton",
             async run() {
                 await odoo.__WOWL_DEBUG__.root.env.services["mail.messaging"].isReady;
                 if (odoo.__WOWL_DEBUG__.root.env.services.bus_service.isActive) {
-                    throw new Error("Bus service should not be started eagerly");
+                    throw new Error("Bus service should not start when loading the page");
+                }
+            },
+        },
+        {
+            trigger: ".o-livechat-LivechatButton",
+        },
+        {
+            trigger: ".o-mail-Composer-input",
+            run: "text Hello, I need help!",
+        },
+        {
+            trigger: ".o-mail-Composer-input",
+            run() {
+                if (odoo.__WOWL_DEBUG__.root.env.services.bus_service.isActive) {
+                    throw new Error("Bus service should not start for temporary live chat");
+                }
+                this.$anchor[0].dispatchEvent(
+                    new KeyboardEvent("keydown", { key: "Enter", which: 13, bubbles: true })
+                );
+            },
+        },
+        {
+            trigger: ".o-mail-Message:contains(Hello, I need help!)",
+            run() {
+                if (!odoo.__WOWL_DEBUG__.root.env.services.bus_service.isActive) {
+                    throw new Error("Bus service should start after first live chat message");
                 }
             },
         },