diff --git a/www/common/outer/support.js b/www/common/outer/support.js
index 912fa5d23..20ee7200d 100644
--- a/www/common/outer/support.js
+++ b/www/common/outer/support.js
@@ -104,6 +104,7 @@ define([
                     msg = JSON.parse(msg);
                 } catch (e) {
                     console.error(e);
+                    return; // Don't show "undefined" messages
                 }
                 msg.time = time;
                 if (author) { msg.author = author; }
@@ -232,6 +233,7 @@ define([
         var anonRpc = Util.find(ctx, [ 'store', 'anon_rpc' ]);
         if (!mailbox) { return void cb('E_NOT_READY'); }
         if (!anonRpc) { return void cb("anonymous rpc session not ready"); }
+        if (!data?.ticket) { return void cb('E_NO_DATA'); }
         var theirPublic, myCurve, notifKey;
         var time;
         nThen((waitFor) => {
diff --git a/www/support/ui.js b/www/support/ui.js
index 45dc74a44..b9e377c26 100644
--- a/www/support/ui.js
+++ b/www/support/ui.js
@@ -162,6 +162,7 @@ define([
     var makeForm = function (ctx, opts, cb) {
         let { oldData, recorded, title, hideNotice } = opts || {};
         var button;
+        cb = Util.once(cb);
 
         if (typeof(cb) === "function") {
             button = h('button.btn.btn-primary.cp-support-list-send', Messages.contacts_send);