diff --git a/webroot/rsrc/js/core/behavior-phabricator-remarkup-assist.js b/webroot/rsrc/js/core/behavior-phabricator-remarkup-assist.js
--- a/webroot/rsrc/js/core/behavior-phabricator-remarkup-assist.js
+++ b/webroot/rsrc/js/core/behavior-phabricator-remarkup-assist.js
@@ -393,6 +393,12 @@
           return;
         }
 
+        // Let other listeners (particularly the inline autocomplete) have a
+        // chance to handle this event.
+        if (JX.Stratcom.pass()) {
+          return;
+        }
+
         var raw = e.getRawEvent();
         if (raw.shiftKey) {
           // If the shift key is pressed, let the browser write a newline into
@@ -412,8 +418,7 @@
         // This allows 'workflow' and similar actions to take effect.
         // Such as pontificate in Conpherence
         var form = e.getNode('tag:form');
-        var r = JX.DOM.invoke(form, 'didSyntheticSubmit');
-
+        JX.DOM.invoke(form, 'didSyntheticSubmit');
       });
   }
 
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
@@ -127,7 +127,7 @@
       }
 
       // Get all the text on the current line. If the line only contains
-      // whitespace, don't actiavte: the user is probably typing code or a
+      // whitespace, don't activate: the user is probably typing code or a
       // numbered list.
       var line = area.value.substring(0, head - 1);
       line = line.split('\n');
@@ -454,7 +454,7 @@
 
         // If the user hasn't typed any text yet after typing the character
         // which can summon the autocomplete, deactivate and let the keystroke
-        // through. For example, We hit this when a line ends with an
+        // through. For example, we hit this when a line ends with an
         // autocomplete character and the user is trying to type a newline.
         if (range.start == this._cursorHead) {
           this._deactivate();
@@ -529,9 +529,13 @@
         }
       }
 
+      // 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
+      // interact destructively.
       var ignore = this._getIgnoreList();
       for (ii = 0; ii < ignore.length; ii++) {
-        if (trim.indexOf(ignore[ii]) === 0) {
+        if (text.indexOf(ignore[ii]) === 0) {
           this._deactivate();
           return;
         }