diff --git a/CHANGELOG.md b/CHANGELOG.md
index b30abb4c..15fde3fd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 
 ### 3.2.1: Maintenance Release
 
+ - Fix topic return when topic is falsey. Issue #784
  - Fix notification toast class. Issue #776
  - Fix z-index of dropdown items. Issue #775
 
diff --git a/dist/dashboard.appcache b/dist/dashboard.appcache
index 908f2a85..6617b227 100644
--- a/dist/dashboard.appcache
+++ b/dist/dashboard.appcache
@@ -1,5 +1,5 @@
 CACHE MANIFEST
-# Time: Fri Oct 28 2022 16:27:22 GMT+0100 (British Summer Time)
+# Time: Sun Nov 20 2022 10:57:19 GMT+0000 (Greenwich Mean Time)
 
 CACHE:
 i18n.js
diff --git a/nodes/ui_colour_picker.js b/nodes/ui_colour_picker.js
index 074da488..471ec612 100644
--- a/nodes/ui_colour_picker.js
+++ b/nodes/ui_colour_picker.js
@@ -49,7 +49,7 @@ module.exports = function(RED) {
                     if (node.format === 'hsv') { msg.payload = pay.toHsv(); }
                 }
                 var t = RED.util.evaluateNodeProperty(config.topic,config.topicType || "str",node,msg) || node.topi;
-                if (t) { msg.topic = t; }
+                if (t !== undefined) { msg.topic = t; }
             },
             convert: function(p,o,m) {
                 if (m.payload === undefined || m.payload === null) { return; }
diff --git a/nodes/ui_date_picker.js b/nodes/ui_date_picker.js
index c0aa10b5..c33ef549 100644
--- a/nodes/ui_date_picker.js
+++ b/nodes/ui_date_picker.js
@@ -45,7 +45,7 @@ module.exports = function(RED) {
             },
             beforeSend: function (msg) {
                 var t = RED.util.evaluateNodeProperty(config.topic,config.topicType || "str",node,msg) || node.topi;
-                if (t) { msg.topic = t; }
+                if (t !== undefined) { msg.topic = t; }
             }
         });
         node.on("close", done);
diff --git a/nodes/ui_dropdown.js b/nodes/ui_dropdown.js
index a24fd9c9..5837bb03 100644
--- a/nodes/ui_dropdown.js
+++ b/nodes/ui_dropdown.js
@@ -181,7 +181,7 @@ module.exports = function(RED) {
                     msg.payload = emitOptions.value;
                 }
                 var t = RED.util.evaluateNodeProperty(config.topic,config.topicType || "str",node,msg) || node.topi;
-                if (t) { msg.topic = t; }
+                if (t !== undefined) { msg.topic = t; }
                 if (msg.payload === null || msg._dontSend) { node.status({}); }
                 else {
                     var stat = "";
diff --git a/nodes/ui_form.js b/nodes/ui_form.js
index ad8af7a4..3bd06695 100644
--- a/nodes/ui_form.js
+++ b/nodes/ui_form.js
@@ -37,7 +37,7 @@ module.exports = function(RED) {
             },
             beforeSend: function (msg) {
                 var t = RED.util.evaluateNodeProperty(config.topic,config.topicType || "str",node,msg) || node.topi;
-                if (t) { msg.topic = t; }
+                if (t !== undefined) { msg.topic = t; }
             }
         });
         node.on("close", done);
diff --git a/nodes/ui_numeric.js b/nodes/ui_numeric.js
index 56ee5782..2f5b839e 100644
--- a/nodes/ui_numeric.js
+++ b/nodes/ui_numeric.js
@@ -43,7 +43,7 @@ module.exports = function(RED) {
             beforeSend: function (msg) {
                 msg.payload = parseFloat(msg.payload);
                 var t = RED.util.evaluateNodeProperty(config.topic,config.topicType || "str",node,msg) || node.topi;
-                if (t) { msg.topic = t; }
+                if (t !== undefined) { msg.topic = t; }
                 if (node.pt) {
                     node.status({shape:"dot",fill:"grey",text:msg.payload});
                 }
diff --git a/nodes/ui_slider.js b/nodes/ui_slider.js
index 5f843c06..17f2c7a5 100644
--- a/nodes/ui_slider.js
+++ b/nodes/ui_slider.js
@@ -39,7 +39,7 @@ module.exports = function(RED) {
             },
             beforeSend: function (msg) {
                 var t = RED.util.evaluateNodeProperty(config.topic,config.topicType || "str",node,msg) || node.topi;
-                if (t) { msg.topic = t; }
+                if (t !== undefined) { msg.topic = t; }
                 if (node.pt) {
                     node.status({shape:"dot",fill:"grey",text:msg.payload});
                 }
diff --git a/nodes/ui_switch.js b/nodes/ui_switch.js
index e4858cf7..2493dc78 100644
--- a/nodes/ui_switch.js
+++ b/nodes/ui_switch.js
@@ -135,7 +135,7 @@ module.exports = function(RED) {
             },
             beforeSend: function (msg) {
                 var t = RED.util.evaluateNodeProperty(config.topic,config.topicType || "str",node,msg) || node.topi;
-                if (t) { msg.topic = t; }
+                if (t !== undefined) { msg.topic = t; }
             }
         });
 
diff --git a/nodes/ui_text_input.js b/nodes/ui_text_input.js
index 57fb2874..a86d1bc6 100644
--- a/nodes/ui_text_input.js
+++ b/nodes/ui_text_input.js
@@ -41,7 +41,7 @@ module.exports = function(RED) {
                 // if (config.mode === "week") { msg.payload = Date.parse(msg.payload); }
                 // if (config.mode === "month") { msg.payload = Date.parse(msg.payload); }
                 var t = RED.util.evaluateNodeProperty(config.topic,config.topicType || "str",node,msg) || node.topi;
-                if (t) { msg.topic = t; }
+                if (t !== undefined) { msg.topic = t; }
             }
         });
         node.on("close", done);