From 395a2b3fcc38f8ac5fa32c5198a750a6292cad59 Mon Sep 17 00:00:00 2001
From: Monica Kozbial <kozbial@google.com>
Date: Mon, 21 Sep 2020 14:33:16 -0700
Subject: [PATCH] Don't update disabled on children of collapsed blocks.
 (#4302)

---
 core/block_svg.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/block_svg.js b/core/block_svg.js
index 6daac7ae0..bf13267f4 100644
--- a/core/block_svg.js
+++ b/core/block_svg.js
@@ -974,6 +974,9 @@ Blockly.BlockSvg.prototype.applyColour = function() {
 Blockly.BlockSvg.prototype.updateDisabled = function() {
   var children = this.getChildren(false);
   this.applyColour();
+  if (this.isCollapsed()) {
+    return;
+  }
   for (var i = 0, child; (child = children[i]); i++) {
     if (child.rendered) {
       child.updateDisabled();