diff --git a/packages/node_modules/@node-red/nodes/core/common/lib/debug/debug-utils.js b/packages/node_modules/@node-red/nodes/core/common/lib/debug/debug-utils.js
index 0a84b24c7..55216e2c2 100644
--- a/packages/node_modules/@node-red/nodes/core/common/lib/debug/debug-utils.js
+++ b/packages/node_modules/@node-red/nodes/core/common/lib/debug/debug-utils.js
@@ -536,10 +536,22 @@ RED.debug = (function() {
                 e.stopPropagation();
                 showMessageMenu(filterMessage,debugMessage,sourceNode&&sourceNode.id);
             });
-            $('<span class="red-ui-debug-msg-topic">'+
-                (o.topic?topic+' : ':'')+
-                (o.property?'msg.'+property:'msg')+" : "+format+
-                '</span>').appendTo(metaRow);
+            const msgInfos = `${o.topic ? " : " : ""}msg${o.property ? "." + property : ""} : ${format}`
+            const topicTruncated = RED.utils.truncateString((o.topic ? topic : ""), 120 - msgInfos.length);
+            const topicElem = $('<span class="red-ui-debug-msg-topic">' + topicTruncated + msgInfos + '</span>').appendTo(metaRow);
+            if (topic !== topicTruncated) {
+                RED.popover.create({
+                    content: topic,
+                    delay: { show: 750, hide: 50 },
+                    direction: "bottom",
+                    interactive: true,
+                    maxWidth: 300,
+                    target: topicElem,
+                    trigger: "hover",
+                    tooltip: true,
+                    size: "small"
+                });
+            }
         }
 
         var atBottom = (sbc.scrollHeight-messageList.height()-sbc.scrollTop) < 5;