diff --git a/AxonIvyPortal/portal/webContent/layouts/includes/topbar.xhtml b/AxonIvyPortal/portal/webContent/layouts/includes/topbar.xhtml
index dd95d5f82b..bef0bb7f12 100644
--- a/AxonIvyPortal/portal/webContent/layouts/includes/topbar.xhtml
+++ b/AxonIvyPortal/portal/webContent/layouts/includes/topbar.xhtml
@@ -50,7 +50,7 @@
           <p:commandLink id="theme-switcher" disabled="#{!themeBean.enableSwitchThemeButton}" ariaLabel="#{ivy.cms.co('/ch.ivy.addon.portalkit.ui.jsf/applicationMenuHeader/ThemeSwitcher')}"
             onclick="PrimeFaces.FreyaConfigurator.changeLayout('ivy', '#{ivyFreyaTheme.mode == 'light' ? 'dark' : 'light'}');Portal.changePortalVariableTheme('#{ivyFreyaTheme.mode == 'light' ? 'dark' : 'light'}');">
             <i class="topbar-icon pi pi-#{ivyFreyaTheme.mode == 'light' ? 'moon' : 'sun'}" />
-            <p:ajax onstart="PrimeFaces.FreyaConfigurator.beforeResourceChange();" oncomplete="reloadIframes();"
+            <p:ajax onstart="PrimeFaces.FreyaConfigurator.beforeResourceChange();" oncomplete="reloadIframesInsidePortalAIChat();"
               listener="#{themeBean.toggleTheme()}" update="theme-switcher #{p:resolveFirstComponentWithId('content-container:iFrame', view).clientId}" />
           </p:commandLink>
         </li>
diff --git a/AxonIvyPortal/portal/webContent/resources/js/portal.js b/AxonIvyPortal/portal/webContent/resources/js/portal.js
index 48e5a524a4..23b43079dd 100644
--- a/AxonIvyPortal/portal/webContent/resources/js/portal.js
+++ b/AxonIvyPortal/portal/webContent/resources/js/portal.js
@@ -389,11 +389,15 @@ function getWidgetVarById(id) {
 }
 
 
-function reloadIframes() {
-  var iframes = document.querySelectorAll('iframe');
-  iframes.forEach(function(iframe) {
-      iframe.contentWindow.location.reload();
-  });
+function reloadIframesInsidePortalAIChat() {
+  var iframeInsidePortalAIChat = document.getElementById('iFrame');
+  if (iframeInsidePortalAIChat) {
+    var contentInsideIframe = iframeInsidePortalAIChat.contentDocument || iframeInsidePortalAIChat.contentWindow.document;
+    var iframes = contentInsideIframe.getElementsByClassName('message-iframe');
+    for (let item of iframes) {
+      item.src = item.src;
+    }
+  }
 }
 
 function handleKeyDown(event) {