diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -14,7 +14,7 @@
     'differential.pkg.js' => '11a5b750',
     'diffusion.pkg.css' => '3783278d',
     'diffusion.pkg.js' => '5b4010f4',
-    'javelin.pkg.js' => '0452e69d',
+    'javelin.pkg.js' => '9f6d38c7',
     'maniphest.pkg.css' => 'f1887d71',
     'maniphest.pkg.js' => '2fe8af22',
     'rsrc/css/aphront/aphront-bars.css' => '231ac33c',
@@ -208,7 +208,7 @@
     'rsrc/externals/javelin/lib/Resource.js' => '356de121',
     'rsrc/externals/javelin/lib/URI.js' => 'd9a9b862',
     'rsrc/externals/javelin/lib/Vector.js' => '039fb90d',
-    'rsrc/externals/javelin/lib/Workflow.js' => 'f28bf201',
+    'rsrc/externals/javelin/lib/Workflow.js' => 'ff8091f7',
     'rsrc/externals/javelin/lib/__tests__/Cookie.js' => '5ed109e8',
     'rsrc/externals/javelin/lib/__tests__/DOM.js' => 'c984504b',
     'rsrc/externals/javelin/lib/__tests__/JSON.js' => '2295d074',
@@ -668,7 +668,7 @@
     'javelin-view-interpreter' => '0c33c1a0',
     'javelin-view-renderer' => '6c2b09a2',
     'javelin-view-visitor' => 'efe49472',
-    'javelin-workflow' => 'f28bf201',
+    'javelin-workflow' => 'ff8091f7',
     'lightbox-attachment-css' => '7acac05d',
     'maniphest-batch-editor' => '8f380ebc',
     'maniphest-report-css' => '6fc16517',
@@ -1883,17 +1883,6 @@
       4 => 'javelin-request',
       5 => 'javelin-workflow',
     ),
-    'f28bf201' =>
-    array(
-      0 => 'javelin-stratcom',
-      1 => 'javelin-request',
-      2 => 'javelin-dom',
-      3 => 'javelin-vector',
-      4 => 'javelin-install',
-      5 => 'javelin-util',
-      6 => 'javelin-mask',
-      7 => 'javelin-uri',
-    ),
     'f42bb8c6' =>
     array(
       0 => 'javelin-stratcom',
@@ -1985,6 +1974,17 @@
       2 => 'javelin-workflow',
       3 => 'javelin-dom',
     ),
+    'ff8091f7' =>
+    array(
+      0 => 'javelin-stratcom',
+      1 => 'javelin-request',
+      2 => 'javelin-dom',
+      3 => 'javelin-vector',
+      4 => 'javelin-install',
+      5 => 'javelin-util',
+      6 => 'javelin-mask',
+      7 => 'javelin-uri',
+    ),
     28497740 =>
     array(
       0 => 'javelin-behavior',
diff --git a/webroot/rsrc/externals/javelin/lib/Workflow.js b/webroot/rsrc/externals/javelin/lib/Workflow.js
--- a/webroot/rsrc/externals/javelin/lib/Workflow.js
+++ b/webroot/rsrc/externals/javelin/lib/Workflow.js
@@ -107,26 +107,39 @@
         JX.Workflow._pop();
       } else {
         var form = event.getNode('jx-dialog');
+        JX.Workflow._dosubmit(form, t);
+      }
+    },
+    _onsyntheticsubmit : function(e) {
+      if (JX.Stratcom.pass()) {
+        return;
+      }
+      if (JX.Workflow._disabled) {
+        return;
+      }
+      e.prevent();
+      var form = e.getNode('jx-dialog');
+      var button = JX.DOM.find(form, 'button', '__default__');
+      JX.Workflow._dosubmit(form, button);
+    },
+    _dosubmit : function(form, button) {
+      // Issue a DOM event first, so form-oriented handlers can act.
+      var dom_event = JX.DOM.invoke(form, 'didWorkflowSubmit');
+      if (dom_event.getPrevented()) {
+        return;
+      }
 
-        // Issue a DOM event first, so form-oriented handlers can act.
-        var dom_event = JX.DOM.invoke(form, 'didWorkflowSubmit');
-        if (dom_event.getPrevented()) {
-          return;
-        }
-
-        var data = JX.DOM.convertFormToListOfPairs(form);
-
-        data.push([t.name, t.value || true]);
+      var data = JX.DOM.convertFormToListOfPairs(form);
+      data.push([button.name, button.value || true]);
 
-        var active = JX.Workflow._getActiveWorkflow();
-        var e = active.invoke('submit', {form: form, data: data});
-        if (!e.getStopped()) {
-          active._destroy();
-          active
-            .setURI(form.getAttribute('action') || active.getURI())
-            .setDataWithListOfPairs(data)
-            .start();
-        }
+      var active = JX.Workflow._getActiveWorkflow();
+      var e = active.invoke('submit', {form: form, data: data});
+      if (!e.getStopped()) {
+        active._destroy();
+        active
+          .setURI(form.getAttribute('action') || active.getURI())
+          .setDataWithListOfPairs(data)
+          .start();
       }
     },
     _getActiveWorkflow : function() {
@@ -155,6 +168,11 @@
           'click',
           [['jx-workflow-button'], ['tag:button']],
           JX.Workflow._onbutton);
+        JX.DOM.listen(
+          this._root,
+          'didSyntheticSubmit',
+          [],
+          JX.Workflow._onsyntheticsubmit);
         document.body.appendChild(this._root);
         var d = JX.Vector.getDim(this._root);
         var v = JX.Vector.getViewport();