From 40ea759e2c06c7d10a4e4e704a3f70939356107f Mon Sep 17 00:00:00 2001
From: Hiroyasu Nishiyama <hiroyasu.nishiyama.uq@hitachi.com>
Date: Wed, 10 Mar 2021 09:03:52 +0900
Subject: [PATCH] fix vanishing link in subflow

---
 .../@node-red/editor-client/src/js/nodes.js   | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/packages/node_modules/@node-red/editor-client/src/js/nodes.js b/packages/node_modules/@node-red/editor-client/src/js/nodes.js
index fd6296ef2..32b70bc63 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/nodes.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/nodes.js
@@ -413,6 +413,27 @@ RED.nodes = (function() {
             nodeTabMap[z] = {};
         }
         nodeTabMap[z][node.id] = node;
+        var nl = nodeLinks[node.id];
+        if (nl) {
+            nl.in.forEach((l) => {
+                var idx = linkTabMap[node.z].indexOf(l);
+                if (idx != -1) {
+                    linkTabMap[node.z].splice(idx, 1);
+                }
+                if ((l.source.z === z) && linkTabMap[z]) {
+                    linkTabMap[z].push(l);
+                }
+            });
+            nl.out.forEach((l) => {
+                var idx = linkTabMap[node.z].indexOf(l);
+                if (idx != -1) {
+                    linkTabMap[node.z].splice(idx, 1);
+                }
+                if ((l.target.z === z) && linkTabMap[z]) {
+                    linkTabMap[z].push(l);
+                }
+            });
+        }
         node.z = z;
         RED.events.emit("nodes:change",node);
     }