From fdae75c99bac438348d3fe9552047c72d35fc2ed Mon Sep 17 00:00:00 2001
From: Dave Conway-Jones <conway@uk.ibm.com>
Date: Wed, 21 Feb 2018 21:53:44 +0000
Subject: [PATCH] ensure trigger gets reset when 2nd output is null

to fix #1644
---
 nodes/core/core/89-trigger.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/nodes/core/core/89-trigger.js b/nodes/core/core/89-trigger.js
index 387a083e5..f5fd28b7f 100644
--- a/nodes/core/core/89-trigger.js
+++ b/nodes/core/core/89-trigger.js
@@ -123,6 +123,7 @@ module.exports = function(RED) {
                                     delete node.topics[topic];
                                     node.send(msg2);
                                 }
+                                else { delete node.topics[topic]; }
                                 node.status({});
                             }, node.duration);
                         }