diff --git a/static/panels.js b/static/panels.js
index 1f8787ed..ec549f6a 100644
--- a/static/panels.js
+++ b/static/panels.js
@@ -1704,6 +1704,12 @@ async function createKanbanTask(){
 let _kanbanTaskModalMode = 'create';   // 'create' | 'edit'
 let _kanbanTaskModalEditingId = null;  // task id when mode === 'edit'
 let _kanbanProfileNamesCache = null;   // populated lazily on first modal open
+let _kanbanProfileNamesCacheAt = 0;
+const _KANBAN_PROFILE_NAMES_CACHE_TTL_MS = 30000;
+function _invalidateKanbanProfileCache() {
+  _kanbanProfileNamesCache = null;
+  _kanbanProfileNamesCacheAt = 0;
+}
 // Status the modal *displayed* on edit-mode open.  If the user doesn't touch
 // the dropdown, we must NOT send `status` in the PATCH payload — otherwise
 // editing a task whose real status is non-editable in this dropdown
@@ -1714,9 +1720,13 @@ let _kanbanProfileNamesCache = null;   // populated lazily on first modal open
 let _kanbanTaskModalInitialDisplayedStatus = null;
 
 async function _kanbanLoadProfileNames(){
-  // Hit /api/profiles once per session and cache; refresh is cheap if needed.
+  // Hit /api/profiles once per session and cache for a short TTL.
   // Returns an array of profile names (sorted, default first if present).
-  if (Array.isArray(_kanbanProfileNamesCache)) return _kanbanProfileNamesCache;
+  const hasFreshCache = (
+    Array.isArray(_kanbanProfileNamesCache) &&
+    (Date.now() - _kanbanProfileNamesCacheAt) < _KANBAN_PROFILE_NAMES_CACHE_TTL_MS
+  );
+  if (hasFreshCache) return _kanbanProfileNamesCache;
   try {
     const data = await api('/api/profiles');
     const profiles = Array.isArray(data && data.profiles) ? data.profiles : [];
@@ -1728,9 +1738,11 @@ async function _kanbanLoadProfileNames(){
       return a.localeCompare(b);
     });
     _kanbanProfileNamesCache = names;
+    _kanbanProfileNamesCacheAt = Date.now();
     return names;
   } catch(_) {
     _kanbanProfileNamesCache = [];
+    _kanbanProfileNamesCacheAt = Date.now();
     return [];
   }
 }
@@ -4209,6 +4221,7 @@ async function deleteCurrentProfile(){
   if(!_ok) return;
   try {
     await api('/api/profile/delete', { method: 'POST', body: JSON.stringify({ name }) });
+    _invalidateKanbanProfileCache();
     _clearProfileDetail();
     await loadProfilesPanel();
     showToast(t('profile_deleted', name));
@@ -4486,6 +4499,7 @@ async function saveProfileForm(){
     if (baseUrl) payload.base_url = baseUrl;
     if (apiKey) payload.api_key = apiKey;
     await api('/api/profile/create', { method: 'POST', body: JSON.stringify(payload) });
+    _invalidateKanbanProfileCache();
     _profilePreFormDetail = null;
     await loadProfilesPanel();
     showToast(t('profile_created', name));
@@ -4506,6 +4520,7 @@ async function deleteProfile(name) {
   if(!_delProf) return;
   try {
     await api('/api/profile/delete', { method: 'POST', body: JSON.stringify({ name }) });
+    _invalidateKanbanProfileCache();
     await loadProfilesPanel();
     showToast(t('profile_deleted', name));
   } catch (e) { showToast(t('delete_failed') + e.message); }
diff --git a/tests/test_kanban_ui_static.py b/tests/test_kanban_ui_static.py
index 38ac42d7..53a4b91d 100644
--- a/tests/test_kanban_ui_static.py
+++ b/tests/test_kanban_ui_static.py
@@ -801,6 +801,52 @@ def test_kanban_active_board_persisted_to_localstorage():
     assert "_kanbanSetSavedBoard" in PANELS
 
 
+def test_kanban_profile_assignee_cache_has_invalidation_path():
+    """Kanban assignee suggestions should stay aligned with profile mutations.
+
+    The cache in _kanbanLoadProfileNames() can become stale when profiles are
+    created or deleted in the same session. This adds an explicit
+    invalidation path and a short TTL so modal opens recover from same-session
+    mutations and cross-tab/CLI changes.
+    """
+    assert "_KANBAN_PROFILE_NAMES_CACHE_TTL_MS" in PANELS
+    assert "_kanbanProfileNamesCacheAt" in PANELS
+    assert "_invalidateKanbanProfileCache" in PANELS
+
+    load_start = PANELS.find("async function _kanbanLoadProfileNames(){")
+    assert load_start != -1, "Missing _kanbanLoadProfileNames() declaration"
+    load_end = PANELS.find("\n}\n\nasync function _kanbanPopulateAssigneeSelect", load_start)
+    if load_end == -1:
+        load_end = PANELS.find("\n}\n\nfunction openKanbanCreate", load_start)
+    load_body = PANELS[load_start:load_end] if load_end != -1 else PANELS[load_start:load_start + 2200]
+    assert "Date.now() - _kanbanProfileNamesCacheAt" in load_body
+    assert "_kanbanProfileNamesCacheAt = Date.now()" in load_body
+
+    save_start = PANELS.find("async function saveProfileForm(){")
+    assert save_start != -1, "Missing saveProfileForm() declaration"
+    save_end = PANELS.find("\n}\n\n// Back-compat", save_start)
+    save_body = PANELS[save_start:save_end if save_end != -1 else save_start + 2000]
+    assert "_invalidateKanbanProfileCache();" in save_body, (
+        "Profile create flow should invalidate Kanban assignee cache after success."
+    )
+
+    delete_start = PANELS.find("async function deleteProfile(name) {")
+    assert delete_start != -1, "Missing deleteProfile() declaration"
+    delete_end = PANELS.find("\n\n// ── Memory panel", delete_start)
+    delete_body = PANELS[delete_start:delete_end if delete_end != -1 else delete_start + 1300]
+    assert "_invalidateKanbanProfileCache();" in delete_body, (
+        "Profile delete flow should invalidate Kanban assignee cache after success."
+    )
+
+    ui_delete_start = PANELS.find("async function deleteCurrentProfile(){")
+    assert ui_delete_start != -1, "Missing deleteCurrentProfile() declaration"
+    ui_delete_end = PANELS.find("\n\nfunction renderProfileDropdown", ui_delete_start)
+    ui_delete_body = PANELS[ui_delete_start:ui_delete_end if ui_delete_end != -1 else ui_delete_start + 1300]
+    assert "_invalidateKanbanProfileCache();" in ui_delete_body, (
+        "Profile detail delete flow (deleteCurrentProfile) should invalidate Kanban assignee cache after success."
+    )
+
+
 def test_kanban_archive_board_uses_showConfirmDialog():
     """Archive is destructive → must use the styled showConfirmDialog,
     not native confirm() (which can't be styled or i18n'd)."""