diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -528,7 +528,7 @@
     'rsrc/js/phui/behavior-phui-tab-group.js' => '0a0b10e9',
     'rsrc/js/phuix/PHUIXActionListView.js' => 'b5c256b8',
     'rsrc/js/phuix/PHUIXActionView.js' => '442efd08',
-    'rsrc/js/phuix/PHUIXAutocomplete.js' => '623a766b',
+    'rsrc/js/phuix/PHUIXAutocomplete.js' => '7fa5c915',
     'rsrc/js/phuix/PHUIXButtonView.js' => '8a91e1ac',
     'rsrc/js/phuix/PHUIXDropdownMenu.js' => '04b2ae03',
     'rsrc/js/phuix/PHUIXExample.js' => '68af71ca',
@@ -881,7 +881,7 @@
     'phui-workpanel-view-css' => 'a3a63478',
     'phuix-action-list-view' => 'b5c256b8',
     'phuix-action-view' => '442efd08',
-    'phuix-autocomplete' => '623a766b',
+    'phuix-autocomplete' => '7fa5c915',
     'phuix-button-view' => '8a91e1ac',
     'phuix-dropdown-menu' => '04b2ae03',
     'phuix-form-control-view' => '16ad6224',
@@ -1407,12 +1407,6 @@
       'javelin-magical-init',
       'javelin-util',
     ),
-    '623a766b' => array(
-      'javelin-install',
-      'javelin-dom',
-      'phuix-icon-view',
-      'phabricator-prefab',
-    ),
     '628f59de' => array(
       'phui-oi-list-view-css',
     ),
@@ -1563,6 +1557,12 @@
     '7f243deb' => array(
       'javelin-install',
     ),
+    '7fa5c915' => array(
+      'javelin-install',
+      'javelin-dom',
+      'phuix-icon-view',
+      'phabricator-prefab',
+    ),
     '81144dfa' => array(
       'javelin-behavior',
       'javelin-behavior-device',
diff --git a/webroot/rsrc/js/phuix/PHUIXAutocomplete.js b/webroot/rsrc/js/phuix/PHUIXAutocomplete.js
--- a/webroot/rsrc/js/phuix/PHUIXAutocomplete.js
+++ b/webroot/rsrc/js/phuix/PHUIXAutocomplete.js
@@ -521,6 +521,18 @@
         return;
       }
 
+      // Deactivate immediately if a user types a character that we are
+      // reasonably sure means they don't want to use the autocomplete. For
+      // example, "##" is almost certainly a header or monospaced text, not
+      // a project autocompletion.
+      var cancels = this._getCancelCharacters();
+      for (var ii = 0; ii < cancels.length; ii++) {
+        if (text.indexOf(cancels[ii]) !== -1) {
+          this._deactivate();
+          return;
+        }
+      }
+
       var trim = this._trim(text);
 
       // If this rule has a prefix pattern, like the "[[ document ]]" rule,
@@ -541,18 +553,6 @@
       // This needs to match what we pass to the typeahead datasource.
       this._value = trim;
 
-      // Deactivate immediately if a user types a character that we are
-      // reasonably sure means they don't want to use the autocomplete. For
-      // example, "##" is almost certainly a header or monospaced text, not
-      // a project autocompletion.
-      var cancels = this._getCancelCharacters();
-      for (var ii = 0; ii < cancels.length; ii++) {
-        if (trim.indexOf(cancels[ii]) !== -1) {
-          this._deactivate();
-          return;
-        }
-      }
-
       // Deactivate immediately if the user types an ignored token like ":)",
       // the smiley face emoticon. Note that we test against "text", not
       // "trim", because the ignore list and suffix list can otherwise