diff --git a/AxonIvyPortal/portal/src_hd/ch/ivy/addon/portalkit/component/CaseItemDetails/CaseItemDetails.xhtml b/AxonIvyPortal/portal/src_hd/ch/ivy/addon/portalkit/component/CaseItemDetails/CaseItemDetails.xhtml
index 37832499367..30fdc8ae336 100644
--- a/AxonIvyPortal/portal/src_hd/ch/ivy/addon/portalkit/component/CaseItemDetails/CaseItemDetails.xhtml
+++ b/AxonIvyPortal/portal/src_hd/ch/ivy/addon/portalkit/component/CaseItemDetails/CaseItemDetails.xhtml
@@ -229,6 +229,14 @@
           iframes.remove();
         }
         if (window.history.length > 2) {
+          // handle for bug https://1ivy.atlassian.net/browse/IVYPORTAL-17122
+          // when user open case detail from dashboard or full case list -> related task -> start task in iFrame -> cancel
+          // if url of current document is openning task in iFrame
+          if (document.referrer.includes('TaskTemplateIFrame.xhtml?taskUrl=')){
+            // back to case list to avoid go error: click back will navigate to openning task
+            backToCasesList();
+            return;
+          }
           window.history.back();
         } else {
           // if no history or back from a page in Frame