diff --git a/static/js/emailLibrary.js b/static/js/emailLibrary.js
index 2a6a31d9b..d691798ec 100644
--- a/static/js/emailLibrary.js
+++ b/static/js/emailLibrary.js
@@ -952,8 +952,20 @@ function _libCachePut(key, value) {
   }
 }
 
+function _resetBulkSelectionForContextChange({ rerender = false } = {}) {
+  const hadSelection = !!(state._selectedUids && state._selectedUids.size);
+  const wasSelectMode = !!state._selectMode;
+  if (state._selectedUids) state._selectedUids.clear();
+  state._selectMode = false;
+  if (hadSelection || wasSelectMode) {
+    _updateBulkBar();
+    if (rerender) _renderGrid();
+  }
+}
+
 function _resetEmailListForFreshLoad() {
   _exitEmailReaderModeForList();
+  _resetBulkSelectionForContextChange();
   state._libOffset = 0;
   state._libEmails = [];
   state._libTotal = 0;
@@ -2507,6 +2519,7 @@ function _clearFilterPillSideEffect() {
 
 function _addSearchPill(pill) {
   if (!pill) return;
+  _resetBulkSelectionForContextChange({ rerender: true });
   if (!Array.isArray(state._libSearchPills)) state._libSearchPills = [];
   // Dedup by email (contact), text (text pill), or filter value.
   if (pill.type === 'contact') {
@@ -2541,6 +2554,7 @@ function _searchQueryFromPills() {
 
 function _removeSearchPillAt(idx) {
   if (!Array.isArray(state._libSearchPills)) return;
+  _resetBulkSelectionForContextChange({ rerender: true });
   const removed = state._libSearchPills[idx];
   state._libSearchPills.splice(idx, 1);
   if (removed && removed.type === 'filter') _clearFilterPillSideEffect();
@@ -2718,6 +2732,7 @@ async function _initEmailSearchChipBar() {
   // directly.
   let _libSearchTypingTimer = null;
   input.addEventListener('input', async () => {
+    _resetBulkSelectionForContextChange({ rerender: true });
     state._libSearchDraft = input.value;
     await _refreshSuggestions();
     if (_libSearchTypingTimer) clearTimeout(_libSearchTypingTimer);
@@ -2853,6 +2868,7 @@ window.addEventListener('click', (e) => {
 
 async function _doSearch() {
   _exitEmailReaderModeForList();
+  _resetBulkSelectionForContextChange({ rerender: true });
   const seq = ++_libSearchSeq;
   const derived = _deriveSearchScope(state._libSearch);
   const q = derived.q;
diff --git a/tests/test_email_library_bulk_actions.py b/tests/test_email_library_bulk_actions.py
index 900e0a665..4434784cc 100644
--- a/tests/test_email_library_bulk_actions.py
+++ b/tests/test_email_library_bulk_actions.py
@@ -12,6 +12,16 @@ def _bulk_action_source() -> str:
     return text[start:end]
 
 
+def _function_source(name: str) -> str:
+    text = _EMAIL_LIBRARY.read_text(encoding="utf-8")
+    start = text.index(f"function {name}")
+    next_function = text.find("\nfunction ", start + 1)
+    next_async = text.find("\nasync function ", start + 1)
+    candidates = [idx for idx in (next_function, next_async) if idx != -1]
+    end = min(candidates) if candidates else len(text)
+    return text[start:end]
+
+
 def test_email_bulk_read_unread_calls_provider_write_routes():
     """Bulk read/unread must persist to IMAP/provider, not only mutate UI state.
 
@@ -34,3 +44,33 @@ def test_email_bulk_read_unread_checks_backend_success_before_syncing_cache():
     assert "data?.success === false" in src
     assert "throw new Error(data?.error" in src
     assert "_libCacheWriteBack()" in src
+
+
+def test_email_context_changes_clear_bulk_selection_state():
+    """IMAP UIDs are folder/account scoped, so stale bulk selections must die.
+
+    Folder, account, filter, quick-filter, attachment, and search basis changes
+    must exit select mode before the next list/search view can run bulk actions.
+    """
+    text = _EMAIL_LIBRARY.read_text(encoding="utf-8")
+    reset_src = _function_source("_resetBulkSelectionForContextChange")
+    fresh_src = _function_source("_resetEmailListForFreshLoad")
+    add_pill_src = _function_source("_addSearchPill")
+    remove_pill_src = _function_source("_removeSearchPillAt")
+    search_src = text[text.index("async function _doSearch()"):text.index("// Custom dropdown", text.index("async function _doSearch()"))]
+
+    assert "state._selectedUids.clear()" in reset_src
+    assert "state._selectMode = false" in reset_src
+    assert "_updateBulkBar()" in reset_src
+
+    assert "_resetBulkSelectionForContextChange()" in fresh_src
+    assert "_resetBulkSelectionForContextChange({ rerender: true })" in add_pill_src
+    assert "_resetBulkSelectionForContextChange({ rerender: true })" in remove_pill_src
+    assert "_resetBulkSelectionForContextChange({ rerender: true })" in search_src
+
+    assert "state._libFolder = e.target.value;" in text
+    assert "state._libFilter = e.target.value;" in text
+    assert "state._libHasAttachments = !state._libHasAttachments;" in text
+    assert "state._libAccountId = btn.dataset.accId || null;" in text
+    assert text.count("_loadEmailsFresh();") >= 5
+    assert "state._libSearchDraft = input.value;" in text